16-20 October 2016
Europe/Zurich timezone
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Displaying 132 contributions out of 132
Type: Oral Session: Th - 2
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The aCORN Collaboration has analyzed data taken on the NG-6 beamline at the NIST (National Institute of Standards and Technology) Center for Neutron Research and achieved the most precise measurement to date of the angular correlation (a-coefficient) between the electron and antineutrino emitted in free neutron beta decay. Such a measurement provides a test of the Electroweak Standard Model and, ... More
Presented by Prof. Alexander KOMIVES on 20 Oct 2016 at 12:40
Type: Oral Session: Mo - 4
Track: Searches for symmetry violations and new forces
Neutral particle oscillations have proven to be extremely valuable probes of fundamental physics. Kaon oscillations provided us with our first insight into CP-violation, fast B oscillations provided the first indication that the top quark is extremely heavy, B oscillations form the most fertile ground for the continued study of CP-violation, and neutrino oscillations suggest the existence of a ne ... More
Presented by Gustaaf BROOIJMANS on 17 Oct 2016 at 18:15
Type: Poster Session: Poster Session
Track: Searches for permanent electric dipole moments
A permanent electric dipole moment of the neutron (nEDM) would be a source of CP violation and could shed some light on beyond standard model physics (BSM). Such BSM models predict an nEDM in the range 10-27 – 10-29 e cm while the standard model prediction is much lower (around 10-31 e cm). The search for an nEDM and the setting of new limits on its value is done with the Ramsey method of time s ... More
Presented by Mr. Peter KOSS on 18 Oct 2016 at 17:41
Type: Poster Session: Poster Session
Track: Advanced detector technologies
The detection of events excluded by the Standard Model would be an unambiguous sign of new physics. The MEG Experiment has reached the most stringent upper limit of 4.2 10-13 , in its search for the lepton flavor violating decay mu->e+gamma. The increased beam rate in the MEG-II upgrade experiment requires an improved stopping target. We are investigating the use of a scintillation target, viewed ... More
Presented by Mr. Felix Anton BERG on 18 Oct 2016 at 18:33
Type: Oral Session: Mo - 4
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Pulsed beams have tremendous advantages for precision experiments with cold neutrons. In order to minimize and measure systematic effects, they are used at continuous sources in spite of the related substantial decrease in intensity. At the pulsed neutron source ESS, such experiments will gain up to a factor of 30 in event rate, and novel concepts become feasible. Therefore, the cold neutron beam ... More
Presented by Torsten SOLDNER on 17 Oct 2016 at 17:45
Type: Poster Session: Poster Session
Since the first beam in 2008, Muon Facility in J-PARC has been operated, and the surface muon beam intensity reached at the 3E+6/s, the most intense pulsed muon beam in the world, under 200-kW proton beam. From the existing 2-cm thick graphite target, four secondary muon beam lines are able to be extracted to the experimental areas. Three beam lines were constructed and under operation. They ... More
Presented by Dr. Naritoshi KAWAMURA on 18 Oct 2016 at 18:27
Type: Oral Session: Mo - 4
Track: Searches for permanent electric dipole moments
The search for a finite CP-violating neutron electric dipole moment (nEDM) is motivated in order to understand the observed large matter-antimatter asymmetry in our universe. It has become a worldwide endeavour which is followed by various research teams setting up experiments for improved measurements. Recently, a novel concept to measure a nEDM has been brought forward [Phys. Rev. C 88, 045502 ( ... More
Presented by Dr. Florian PIEGSA on 17 Oct 2016 at 18:00
Type: Poster Session: Poster Session
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
A three-body collision is considered in this work. Specifically, we compute cross sections and rates of the protonium formation reaction between an antiproton and a muonic hydrogen. A more detailed abstract is enclosed.
Presented by Dr. Renat SULTANOV
Type: Poster Session: Poster Session
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The P2 experiment at the new electron accelerator MESA in Mainz aims for a determination of the weak mixing angle at low momentum transfer with unprecedented precision. To this end, the parity violating asymmetry in electron proton scattering is studied with integrating Cherenkov detectors at very high rates of scattered electrons. In order to determine the average momentum transfer and precisely ... More
Presented by Prof. Niklaus BERGER on 18 Oct 2016 at 18:31
Type: Oral Session: Mo - 3
Track: Searches for symmetry violations and new forces
We will present new techniques to detect these particles, relying on interferometry with cold atoms in vacuum. The low density of such atoms compared to bulk matter avoids triggering some screening mechanisms, while the high sensitivity of the interferometer overcomes other screening mechanisms by brute force. We will show limits ruling out substantial regions of parameter space for chameleons and ... More
Presented by Prof. Holger MüLLER on 17 Oct 2016 at 15:00
Type: Oral Session: Tu - 3
Track: Searches for symmetry violations and new forces
In this talk we discuss the current status of searches for very light and very weakly coupled particles. A particular focus will be on the possibility that they are the cold dark matter of the Universe.
Presented by Joerg JAECKEL on 18 Oct 2016 at 14:30
Type: Poster Session: Poster Session
Proton spectroscopy in neutron beta decay gives a complementary access to λ (ratio of the weak coupling constants g_A⁄g_V ) and enables new searches for physics beyond the Standard Model. In experiment, low-energy protons (E_k≤751.4 eV) are usually guided and selected using electromagnetic fields. Precise knowledge of the electrostatic potentials is mandatory as it can drastically bias proton ... More
Presented by Mr. Romain VIROT on 18 Oct 2016 at 18:28
Type: Poster Session: Poster Session
Track: Searches for symmetry violations and new forces
We analyse the Einstein--Cartan gravity in its standard form ${\cal R} = R + {\cal K}^2$, where ${\cal R}$ and $R$ are the Ricci scalar curvatures in the Einstein--Cartan and Einstein gravity, respectively, and ${\cal K}^2$ is the quadratic contribution of torsion in terms of the contorsion tensor ${\cal K}$. We treat torsion as an external (or a background) field and show that the contributi ... More
Presented by Prof. A.N. IVANOV on 18 Oct 2016 at 18:51
Type: Oral Session: We - 2
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
We have constructed a new DC muon beamline, MuSIC (MUon Science Innovative muon beam Channel) at Research Center for Nuclear Physics (RCNP), Osaka University. The MuSIC comprises the world’s most efficient DC muon source using the first pion capture solenoid system and muon beam transport magnets from the solenoid end to an experimental port. We are now commissioning the beamline and alreadyobt ... More
Presented by Dr. Dai TOMONO on 19 Oct 2016 at 12:20
Type: Oral Session: We - 4
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
A new mechanism of neutron acceleration in the accelerated perfect crystal is proposed and found experimentally. The effect arises due to the resonance energy dependence of neutron refraction index in a perfect crystal for neutron energies, close to the Bragg ones. As a result during the neutron time-of-flight through the crystal the value of deviation from the exact Bragg condition changes and so ... More
Presented by Prof. Valery FEDORV on 19 Oct 2016 at 18:10
Type: Poster Session: Poster Session
Track: Searches for permanent electric dipole moments
Precise magnetic field control and monitoring is one of the biggest challenges of all experiments searching for a neutron electric dipole moment (nEDM). In this contribution we describe the way in which the magnetic field is measured by a laser-driven array of Cs magnetometers incorporated in the world’s most sensitive nEDM experiment at PSI.
Presented by Dr. Malgorzata KASPRZAK on 18 Oct 2016 at 18:34
Type: Poster Session: Poster Session
A new measurement of the anomalous magnetic moment of the muon, $a_{\mu} \equiv (g-2)/2$, will be performed at the Fermi National Accelerator Laboratory. The most recent measurement, performed at Brookhaven National Laboratory from 1999 to 2001, shows a 3.3-3.6 standard deviation discrepancy with the standard model value of $g$-$2$. The new measurement will accumulate 21 times those statistics, me ... More
Presented by Dr. Wesley GOHN on 18 Oct 2016 at 18:25
Type: Poster Session: Poster Session
Track: Searches for permanent electric dipole moments
Psychological bias towards (or away from) a prior measurement or a theory prediction is an intrinsic threat to any data analysis. While various methods can be used to avoid the bias (e.g. actively not looking at the result), only data blinding is a traceable and thus trustworthy method to circumvent the bias and to convince the external audience that there is not even an accidental psychological b ... More
Presented by Dr. Jochen KREMPEL on 18 Oct 2016 at 18:36
Type: Poster Session: Poster Session
Pulsed beams have tremendous advantages for precision experiments with cold neutrons. In order to minimize and measure systematic effects, they are used at continuous sources in spite of the related substantial decrease in intensity. At the pulsed neutron source ESS, such experiments will gain up to a factor of 30 in event rate, and novel concepts become feasible. Therefore, the cold neutron ... More
Presented by Torsten SOLDNER on 18 Oct 2016 at 18:23
Type: Poster Session: Poster Session
The antineutrino-electron angular correlation coefficient a is related to the proton recoil spectrum by kinematics. aSPECT measures the integral proton spectrum using magnetic adiabatic collimation and electrostatic retardation. Data acquisition for a 1% measurement of coefficient a was performed during a beam-time in 2013 at the Institut Laue-Langevin in Grenoble. As protons are emitted at low-e ... More
Presented by Dr. Romain MAISONOBE on 18 Oct 2016 at 18:10
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
Neutron $\beta$-decay experiments provide access to important parameters of the Standard Model and are also sensitive to new physics Beyond the Standard Model. Modern neutron decay experiments aim to measure decay correlation parameters with a high sensitivity and therefore require very precise particle detection in either energy, time-of-flight, or both. The Nab experiment, which is under constru ... More
Presented by Mr. Noah BIRGE on 18 Oct 2016 at 17:42
Type: Poster Session: Poster Session
Due to its almost undetectablly small magnitudes predicted from the Standard Model (SM), detection of a non-zero electric dipole moment (EDM) is expected to prove the existence of new physics beyond the SM. Even so, the expected signals for an EDM are extremely small, and thus an elaborate scheme for the suppression of errors in its measurement is essential. As for the atomic EDM of Xe, which is a ... More
Presented by Dr. Tomoya SATO on 18 Oct 2016 at 18:15
Type: Poster Session: Poster Session
The ASACUSA collaboration has developed a scheme for a high precision spectroscopy of the ground-state hyperfine splitting of antihydrogen atoms to test CPT symmetry. A Rabi-type spectroscopic technique is planned to be utilized with a key apparatus, a cusp trap. After a successful production of a flow of antihydrogen atoms from the prototype cusp trap, a new novel double-cusp trap has been deve ... More
Presented by Dr. Naofumi KURODA on 18 Oct 2016 at 17:50
Type: Poster Session: Poster Session
The permanent electric dipole moment (EDM) of an elementary particle is a good candidate to search for the physics beyond the standard model. Francium (Fr) is a radioactive heavy alkali metal and has a large enhancement factor of the electron EDM. The atomic EDM is measured by comparing the difference in the atomic resonance frequency in an external electric field parallel and anti-parallel to the ... More
Presented by Ms. Aiko UCHIYAMA on 18 Oct 2016 at 17:57
Type: Poster Session: Poster Session
Muonium is the bound state of an antimuon with an electron (mu+e-). Muonium is an ideal tool to perform precision measurements of fundamental parameters. This poster presents our ideas to develop a high-brightness muonium source at the Paul Scherrer Institut (PSI). The muonium beam will be produced by deflecting a slow, high-brightness muon beam (currently under development by muCool collaboration ... More
Presented by Mr. Narongrit RITJOHO on 18 Oct 2016 at 18:02
Type: Poster Session: Poster Session
The electron permanent electric dipole moment (EDM) which violates time reversal symmetry is a sensitive tool for exploring the new physics beyond the Standard Model. In order to measure the value precisely, francium atom which has a large enhancement factor of about 900 for the electron EDM is a good candidate. To measure the electron EDM, it is important to have large interaction time between a ... More
Presented by Mr. Kosuke SAKAMOTO on 18 Oct 2016 at 18:04
Type: Poster Session: Poster Session
The permanent electric dipole moment (EDM) is a suitable observable to test theoretical models beyond the standard model (SM) of particle physics. We plan to search for the electron EDM by using the laser cooled francium (Fr) atoms. The features of the laser cooled Fr atoms are as follows. The Fr atom has the largest enhancement factor of the electron EDM in the alkali atoms. Although the Fr atom ... More
Presented by Dr. Takeshi INOUE on 18 Oct 2016 at 17:51
Type: Oral Session: Mo - 2
Track: Searches for permanent electric dipole moments
Searches for the permanent electric dipole moments of atoms, nucleons, and nuclei provide one of the most powerful probes of CP-violation beyond the Standard Model. I survey the opportunities for discovering BSM CP-violation with the present and next generation EDM searches; discuss the complementary of searches using different systems; and highlight the implications of these searches for explaini ... More
Presented by Prof. Michael RAMSEY-MUSOLF on 17 Oct 2016 at 11:30
Type: Poster Session: Poster Session
Track: Searches for permanent electric dipole moments
The sensitivity of a nEDM experiment is linearly proportional to the applied electric field strength. It is therefore important to find ways to maximise the electric field strength in nEDM Ramsey chamber. In the current room temperature PSI experiment the applied electric field is partly limited by depolarisation of the mercury co-magnetometer when the electric field is reversed. We are studying t ... More
Presented by Jacob THORNE on 18 Oct 2016 at 18:58
Type: Oral Session: We - 1
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The ALPHA experiment at CERN aims to address some of the most fundamental issues in modern physics using trapped antihydrogen atoms. Following our successful trapping on antihydrogen [1,2], ALPHA has been performing measurements on the properties of antihydrogen atoms, including a proof of principle of a hyperfine splitting measurement [3], and a search for an anomalous very weak force [4]. Recent ... More
Presented by Dr. Makoto FUJIWARA on 19 Oct 2016 at 09:30
Type: Poster Session: Poster Session
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
We developed fast switchable Bradbury Nielsen gates for the manipulation of low energy protons and hydrogen atoms. Using a system of two coupled gates operated with a variable time delay, we have built an electronic chopper with opening times in the order of 10-500ns. First use of such a system has been a pulsed proton beam of 500 eV energy with a variable energy spread, which is determined by the ... More
Presented by Dr. Wolfgang SCHOTT on 18 Oct 2016 at 18:03
Session: Th - 3
Presented by Klaus Stefan KIRCH on 20 Oct 2016 at 16:40
Type: Oral Session: Th - 2
Track: Low energy precision tests of the Standard Model
In this talk I review the status of flavour physics. I first discuss the theoretical progress of the Standard Model calculations and how they compare to the experimental measurements of BELLE, BABAR, LHCb and MEG. While most observables are in excellent agreement with the theory predictions, in the last years hints for lepton flavor non-universality in channels with muons and tau leptons accumulat ... More
Presented by Andreas CRIVELLIN on 20 Oct 2016 at 11:30
Type: Oral Session: Tu - 4
Track: Low energy precision tests of the Standard Model
The Project 8 collaboration has recently demonstrated the novel technique of Cyclotron Radiation Emission Spectroscopy (CRES) and aims to perform a high precision measurement of the beta decay spectrum of tritium around the endpoint region (Q = 18.6 keV) to investigate the anti-electron neutrino mass scale. I will present first measurements using 83mKr and the phased program towards ameasurement u ... More
Presented by Prof. Martin FERTL on 18 Oct 2016 at 16:20
Type: Oral Session: We - 1
Track: Low energy precision tests of the Standard Model
Two decades after the first production of (relativistic) antihydrogen atoms, and a good decade after the first production of “cold” antihydrogen, first measurements of the properties of antihydrogen have recently begun. Together with the start-up of an additional dedicated low energy antiproton decelerator (ELENA), and the development of a wide range of techniques that permit precise atomic me ... More
Presented by michael DOSER on 19 Oct 2016 at 09:00
Type: Oral Session: Th - 1
Track: Searches for permanent electric dipole moments
Symmetries and conservation laws determine the interactions between particles and the structures in which matter organizes itself. Some of the most fundamental symmetries in physics are the space-time symmetries of Lorentz transformations - where the laws of physics are unchanged under boosts and rotations - and CPT - the combination of charge conjugation (C), parity inversion (P) and time reversa ... More
Presented by Prof. Werner HEIL on 20 Oct 2016 at 09:30
Type: Oral Session: Tu - 2
Track: Low energy precision tests of the Standard Model
Sensitive tests of the standard model are possible through high precision determinations of the weak mixing angle using parity violation electron scattering. The precision which can be reached at very low Q^2 is comparable with the measurements obtained from LEP which are at present still the most precise determinations. Mass scales of new interactions upt to 50 TeV are tested. The prese ... More
Presented by Prof. Frank MAAS on 18 Oct 2016 at 11:30
Type: Oral Session: Tu - 1
Track: Searches for symmetry violations and new forces
I discuss the gauge flavor symmetry (SU(3) and its modifications) between three fermion families. The mass hierarchy between families and the pattern of mixing angles is determined by the breaking pattern of this symmetry which can also lead to predictive schemes. I shall discuss the properties of flavor gauge bosons which should generically induce flavor-nondiagonal couplings, the questions wh ... More
Presented by Prof. Zurab BEREZHIANI on 18 Oct 2016 at 09:00
Type: Oral Session: Tu - 3
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Neutrons have been a useful probe in many fields of science as well as an important physical system for study in themselves. Modern neutron sources provide extraordinary opportunities to study a wide variety of physics topics. Among them is a detailed study of the weak interaction. An overview of studies of the hadronic weak (quark-quark) interactions at the Spallation Neutron Source (SNS) is ... More
Presented by Nadia FOMIN on 18 Oct 2016 at 15:00
Type: Poster Session: Poster Session
Precise knowledge of the nuclear beta spectrum shape forms a sensitive instrument in the pursuit of Beyond Standard Model (BSM) physics. It opens up possibilities for scalar and tensor current searches and allows for a study of nuclear structure dependent effects through the weak magnetism interaction [N. Severijns et al. Rev. Mod. Phys. 78, 991 (2006)]. The latter is a contamination of the strong ... More
Presented by Mr. Leendert HAYDEN on 18 Oct 2016 at 17:55
Type: Poster Session: Poster Session
The high-precision Penning-trap mass spectrometer PENTATRAP [1] is currently being commissioned at the Max-Planck-Institut für Kernphysik, Heidelberg. It aims at mass-ratio measurements of stable and long lived highly charged ions with a relative uncertainty of below 10-11, a precision so far only achieved for a few relatively light elements [2]. A unique feature of PENTATRAP is the experimenta ... More
Presented by Mr. Alexander RISCHKA, Ms. Rima SCHüSSLER on 18 Oct 2016 at 17:52
Session: Mo - 4
Presented by T. SOLDNER, G. KONRAD on 17 Oct 2016 at 18:30
Type: Oral Session: We - 1
Track: Low energy precision tests of the Standard Model
The goal of the ASACUSA CUSP collaboration at the Antiproton Decelerator of CERN is to measure the ground-state hyperfine splitting of antihydrogen using an atomic spectroscopy beamline. The collaboration has recently succeeded in detecting 80 antihydrogen atoms 2.7 meters away from their production trap in a magnetic field free region [1]. This successful detection constitutes a milestone toward ... More
Presented by Dr. Chloé MALBRUNOT on 19 Oct 2016 at 09:50
Type: Oral Session: Tu - 2
Track: Low energy precision tests of the Standard Model
We perform a comprehensive study of charged lepton flavour violation in Randall-Sundrum (RS) models in a fully 5D quantum-field-theoretical framework. We consider the RS model with minimal field content and a ``custodially protected'' extension as well as three implementations of the IR-brane localized Higgs field, including the non-decoupling effect of the KK excitations of a narrow ... More
Presented by Dr. Paul MOCH on 18 Oct 2016 at 12:00
Type: Oral Session: Th - 3
Track: Searches for symmetry violations and new forces
I give an overview of some puzzling results involving muons (g-2, muonic hydrogen Lamb shift, semileptonic decays of B-mesons etc). Their theoretical explanations often invoke new physics in form of light and weakly coupled particles, that is possible to test in high intensity experiments. Many new ideas for such tests have been proposed over the recent years, some followed up by concrete ... More
Presented by Prof. Maxim POSPELOV on 20 Oct 2016 at 15:00
Type: Oral Session: We - 3
Track: Low energy precision tests of the Standard Model
The anomalous magnetic moment of the muon, a_mu = (g_mu - 2)/2, has been measured to 0.54 ppm at BNL (E821), and when compared to the Standard Model (SM) calculation of similar precision, a discrepancy of about 3 sigma remains unexplained. A similar method will be used at FNAL (E989) with the goal of achieving a factor of four increase in experimental precision. An independent method is be ... More
Presented by Dr. Glen MARSHALL on 19 Oct 2016 at 15:50
Type: Poster Session: Poster Session
The MEG II experiment is an upgraded experiment of MEG at PSI. MEG II aims to search the cLFV decay $\mu \to e + \gamma$ with one order of magnitude better sensitivity than MEG. Because the sensitivity is strongly affected by the accidental backgrounds, the resolutions of the detectors must be improved in MEG II. The energy resolution of the $\gamma$ detector is especially important for the $\mu ... More
Presented by Dr. Kei IEKI on 18 Oct 2016 at 17:44
Type: Poster Session: Poster Session
Experiments searching for the electric dipole moment of the neutron (nEDM) require a stable and homogeneous main magnetic field. Statistical errors in such experiments can be dominated by fluctuating magnetic fields if the relevant magnetic-field parameters cannot be measured with sufficient precision and accuracy. Improvements in nEDM sensitivity are thus not possible without improving the magnet ... More
Presented by Dr. Georg BISON on 18 Oct 2016 at 17:58
Type: Poster Session: Poster Session
Parity violating processes are expected in muon interactions with nuclei, with possible new physics contributions dominating, but are as of yet unobserved. The use of muons captured directly into the 2S state of a high Z (\textgreater~30) material and measurement of the 2S$_{1/2}$-1S$_{1/2}$ transition photon angular asymmetry would provide a measurement of any parity violation. As a prerequisite ... More
Presented by Zachary Donovan HODGE on 18 Oct 2016 at 18:06
Type: Oral Session: We - 3
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
All the hierarchy down to hadron, matter can be divided into constituent particles, but hadron like proton, which have finite size and consist from infinite number of quarks and gluons, cannot be subdivided. Thus, how they are formed and the internal structures are the matter of interest for long time. Recently, the proton charge radius was measured by Lamb-shift of muonic hydrogen atom. This muo ... More
Presented by Prof. Masahiko IWASAKI on 19 Oct 2016 at 15:20
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
The Fierz interference term constitutes a very sensitive probe to searches for exotic scalar and tensor couplings in beta decay. It can directly be determined through measurements of the beta spectrum shape. To this end, the 6He decay happens to have a similar kinematic sensitivity than neutron decay despite its end-point is 4.5 larger; the electromagnetic and radiative corrections can be calcul ... More
Presented by Ms. XUEYING HUYAN on 18 Oct 2016 at 17:46
Type: Oral Session: Th - 2
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
High precision measurements of the beta spectrum from neutron and nuclear decay are a sensitive probe for beyond standard model physics. In particular, exotic scalar and tensor couplings can produce Fierz terms which introduce a characteristic distortion to the standard model spectrum, inversely proportional to the beta energy. Employing silicon detectors, with understood charge collection and l ... More
Presented by Dr. Jonathan WEXLER FOR THE NAB & UCNB COLLABORATIONS on 20 Oct 2016 at 12:20
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
With the 1-3 mixing angle measured at reator neutrino experiments Daya Bay and RENO, there are still three unknown oscillation variables: the neutrino mass hierarchy, the octant of the atmospheric mixing angle, and the leptonic CP phase. Of these three, the CP phase is the most difficult to be measured precisely and important for distinguishing flavor symmetries. I will first review the status of ... More
Presented by Dr. Shao-Feng GE on 18 Oct 2016 at 18:14
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
Using the amplitude provided by GoSam, a tool for the automated generation of tree level and one-loop amplitudes, fully differential NLO corrections were obtained for the three decay channels of the muon: The conventional or Michel decay $\mu\to\nu\bar\nu e$, the radiative decay $\mu\to\nu\bar\nu e\gamma$ and the rare decay $\mu\to\nu\bar\nu eee$. Especially the latter two are important Standard M ... More
Presented by Mr. Yannick ULRICH on 18 Oct 2016 at 18:07
Type: Poster Session: Poster Session
UCN source and nEDM experiment are currently under construction at TRIUMF. This poster presents simulations and development of the Monte Carlo program PENTrack, for the nEDM experiment. The latest modifications of PENTrack make it possible to run full Ramsey cycle simulations. This is an invaluable tool for analyzing the systematic and statistical errors associated with the nEDM experiment. The su ... More
Presented by Mr. Nicholas CHRISTOPHER on 18 Oct 2016 at 18:32
Type: Poster Session: Poster Session
The Paul Scherrer Institut will host two next generation charged lepton flavor violation experiments, MEG~II and Mu3e, utilizing the world?s highest intensity continuous muon beams at more than 10$^8$~$\mu^{+}$/s. Critical to these experiments is online monitoring of the muon beam rate and profile throughout data-taking. A novel technique using a 5~$\mu$m luminophore layer of CsI(Tl) deposited on ... More
Presented by Zachary Donovan HODGE on 18 Oct 2016 at 18:00
Type: Oral Session: We - 2
We present the differential decay rates and the branching ratios of the μ → eννγ and μ → eeeνν decays in the SM at next-to-leading order. These two rare decay modes of the muon are among the source of background in the experiments searching for charge lepton flavour violating (CLFV) decays μ → eγ and μ → eee. Indeed, the SM decays are indistinguishable from the CLFV ones except f ... More
Presented by Dr. Matteo FAEL on 19 Oct 2016 at 12:40
Type: Poster Session: Poster Session
Track: Searches for symmetry violations and new forces
Searching for neutral current effects in muonic atoms is an old idea. A muon around a nucleus in the 2S state gets a small parity violating admixture from the 2P state, which then allows E1-M1 interference in the 2S-1S transition. For nuclei around Z=40, the experimental challenge is to deal with the intense background from nP-1S transitions and electrons from Michel decays. We investigate the fe ... More
Presented by Dr. Frederik WAUTERS on 18 Oct 2016 at 18:38
Type: Poster Session: Poster Session
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The NA62 experiment at CERN collected a large sample of charged kaon decays with a highly efficient trigger for decays into electrons in 2007. The kaon beam represents a source of tagged neutral pion decays in vacuum. A measurement of the electromagnetic transition form factor slope of the neutral pion in the time-like region from ~1 million fully reconstructed pi0 Dalitz decay is presented. The l ... More
Presented by Cristina LAZZERONI on 18 Oct 2016 at 18:16
Type: Oral Session: Tu - 2
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The neutron lifetime (880.3 ± 1.1 [sec] [Particle Data Group]) is one of the most important parameters for the Big Bang Nucleosynthesis, which predicts nucleosynthesis in the early universe. So far it has been measured by two different methods, penning trap and UCN bottle, and they got recent value 888.0 ± 2.1 [sec] and 879.6 ± 0.8 [sec] respectively. Although both methods decide the lifetime a ... More
Presented by Tatsuhiko TOMITA on 18 Oct 2016 at 12:20
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
Neutron beta decay is an excellent system to study the charged weak interaction experimentally. The decay is precisely described by theory and unaffected by nuclear structure effects. Observables are numerous correlation coefficients which e.g. relate the spin of the neutron and the momenta of the particles, spectra and the neutron lifetime. Most importantly, precision measurements in neutron b ... More
Presented by Mr. Christoph ROICK on 18 Oct 2016 at 18:37
Type: Poster Session: Poster Session
Observational cosmology has determined the dark matter and dark energy density parameters to an accuracy of two significant figures. While dark energy explains the accelerated expansion of the universe, dark matter is needed in order to describe the rotation curves of galaxies and the large-scale structure of the universe. However, the true nature of dark energy and the content of dark matter rema ... More
Presented by Dr. Tobias JENKE on 18 Oct 2016 at 17:59
Type: Poster Session: Poster Session
The design of the neutron moderators for the European Spallation Source, intended to be installed at the start of operations of the facility in 2019 has now been finalized and the moderators are being fabricated. Among the driving principles in the design have been flexibility for instruments to have access to cold and thermal neutrons with highest possible source brightness. Different design an ... More
Presented by Esben KLINKBY on 18 Oct 2016 at 18:26
Type: Poster Session: Poster Session
The Nab experiment aims to measure the neutron beta decay electron-neutrino correlation coefficient "a" and the Fierz interference term "b". Measurement of "a" to a relative uncertainty of $10^{-3}$ provides $ \lambda$, the ratio of axial to vector coupling constant, at roughly the same precision level as the vector coupling determined from the superallowed decays. A measurement of "b" with an u ... More
Presented by Elizabeth Mae SCOTT on 18 Oct 2016 at 18:01
Type: Poster Session: Poster Session
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Muonium atom is the bound state of a positive muon and an electron. MuSEUM (Muonium Spectroscopy Experiment Using Microwave) collaboration is an international research group for precise determination of the ground-state hyperfine transition frequency of muonium. Since muonium is purely leptonic and free from the finite-size effect of proton, measurement of its hyperfine structure is a good probe f ... More
Presented by Yasuhiro UENO on 18 Oct 2016 at 17:54
Type: Oral Session: We - 2
Track: Low energy precision tests of the Standard Model
In 2010 the CREMA collaboration measured the rms charge radius of the proton via laser spectroscopy of the 2S-2P Lamb shift in muonic hydrogen [1, 2]. Very recently the charge radius of the deuteron was determined [3]. Both measurements yield very precise charge radii but both values result 7 standard deviations away from the expected values, given by CODATA [4]. Follow-up measurements of the Lamb ... More
Presented by Mr. Julian J. KRAUTH on 19 Oct 2016 at 12:00
Type: Oral Session: Tu - 4
Track: Low energy precision tests of the Standard Model
NOvA is a long-baseline neutrino oscillation experiment at Fermilab. It uses two functionally-identical detectors at a distance of 810 km to measure electron-neutrino appearance and muon-neutrino disappearance in the NuMI muon neutrino beam. These measurements address the remaining unknowns in neutrino oscillations: the mass hierarchy, the 𝜃23 octant and possibly the CP violation in the lepto ... More
Presented by Dr. Giulia BRUNETTI on 18 Oct 2016 at 16:40
Type: Poster Session: Poster Session
At the Paul Scherrer Institut an international collaboration searches for a permanent electric dipole moment of the neutron, which is a sensitive probe for physics beyond the Standard Model. This experiment requires very sensitive magnetometers to correct for systematic errors related to magnetic field fluctuations. We present progress on a co-magnetometer which detects the spin precession frequen ... More
Presented by Ms. Sybille KOMPOSCH on 18 Oct 2016 at 18:11
Type: Poster Session: Poster Session
The New Frontiers Group ‘NoMoS’ of the Austrian Academy of Sciences aims to search for traces of new physics in neutron beta decay with novel experimental techniques. Precision measurements in neutron decay allow searching for physics beyond the Standard Model. An accuracy of 1E-4 in the observables corresponds to energy scales of 1 – 100 TeV for new particles and interactions; far above th ... More
Presented by Dr. Gertrud KONRAD on 18 Oct 2016 at 17:47
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
The tau-neutrino CC cross section has never been well measured. There has only been one measurement, by the DONuT experiment, with a systematic uncertainty larger than 50%, mainly due to uncertainties in the Ds differential production cross section in high energy proton interaction. The DsTau collaboration proposes to study tau-neutrino production and the energy distribution by analyzing Ds -> tau ... More
Presented by Dr. Tomoko ARIGA on 18 Oct 2016 at 18:17
Session: Th - 3
Presented by Prof. Brad FILIPPONE on 20 Oct 2016 at 16:30
Type: Oral Session: We - 4
Track: Advanced muon and ultracold neutron sources
Solid deuterium is one of the two practical choices for making UCN convertors at modern UCN sources. The quality of the solid deuterium (SD2) crystal is crucial for obtaining a high UCN yield. The growth of deuterium was intensively studied for small targets in fusion and neutrino mass experiments, also in a somewhat larger size in preparation for the operation of the PSI UCN source. At PULSTA ... More
Presented by Dr. Ekaterina KOROBKINA on 19 Oct 2016 at 17:30
Type: Oral Session: Mo - 3
Track: Low energy precision tests of the Standard Model
The most precise measurement of the property of an elementary particle was measured, using AMO methods in a university laboratory, in order to test the most precise prediction of the Standard Model of particle physics. The incredible precision of the Standard Model's prediction of what is measured is arguably the Standard Model's greatest triumph. At the same time, the Standard Model predicts th ... More
Presented by Prof. Gerald GABRIELSE on 17 Oct 2016 at 14:30
Type: Poster Session: Poster Session
We have developed a positron timing counter (TC) for the MEG II experiment which aims to search for μ+→e+γ decay with the world’s highest sensitivity. The TC is segmented into 512 small scintillation counters with 6 SiPMs at the both ends. Since the positron time is measured by several counters (~9 on average), an excellent timing resolution is expected. We constructed and installed a pa ... More
Presented by Ms. Miki NISHIMURA on 18 Oct 2016 at 18:30
Type: Oral Session: Mo - 3
Track: Low energy precision tests of the Standard Model
We report the status of our experiments aiming to improve the determination of the 1S-2S transition frequency of positronium and muonium atoms.
Presented by Dr. Paolo CRIVELLI on 17 Oct 2016 at 15:50
Type: Poster Session: Poster Session
An upgraded version of the neutron EDM experiment at the Paul Scherrer Institute is in preparation. All systems used in the present experiment version will be designed anew. The data acquisition system must be changed because of higher complexity and assumed better general quality of the whole system. The central part of the DAQ system performs three main tasks: (1) precise timing of the scheduled ... More
Presented by Dr. Jochen KREMPEL, Mr. Michał RAWLIK, Dr. Jacek ZEJMA on 18 Oct 2016 at 17:49
Type: Oral Session: Tu - 2
Track: Precision measurements of fundamental constants
This contribution will provide an overview on recent applications of precision measurements with cooled and stored ions in Penning traps. One the one hand, precision Penning-trap mass measurements provide indispensable information for atomic, nuclear and neutrino physics as well as for testing fundamental symmetries [1,2]. On the other hand, in-trap measurements of the bound-electron g-factor in h ... More
Presented by Prof. Klaus BLAUM on 18 Oct 2016 at 11:00
Type: Oral Session: We - 1
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Comparisons of the fundamental properties of protons and antiprotons constitute sensitive tests of CPT invariance being of one of the most fundamental symmetries in the Standard Model. The Baryon Antibaryon Symmetry Experiment (BASE) located at the antiproton decelerator of CERN is dedicated to determine the proton-to-antiproton charge-to-mass ratio and the magnetic moment of the antiproton wit ... More
Presented by Dr. Christian SMORRA on 19 Oct 2016 at 10:10
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
The Universe around us consist mainly of matter although it is assumed that in the Big Bang an equal amount of antimatter has been produced. The Standard Model prediction for the proportion for the number of the baryons and antibaryons differs from the Astrophysical observations by eight orders of magnitude. To explain this phenomenon, which is usually called the Baryon Asymmetry of the Universe ( ... More
Presented by Dr. Yury VALDAU on 18 Oct 2016 at 18:50
Type: Oral Session: We - 3
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Current and planned experiments using muons as a probe, or as particle to be studied in and of itself, continue to shed light on fundamental physics many decades after its discovery. We continue to be fascinated by the atomic physics implications of the muonic Lamb shift measurements on the proton radius, the nuclear astrophysics implications related to determining the muon capture rate in deuter ... More
Presented by Prof. David HERTZOG on 19 Oct 2016 at 14:30
Type: Oral Session: Tu - 1
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Neutron beta decay is the simplest example of nuclear beta decay. A precise value of the neutron lifetime is important for consistency tests of the Standard Model and Big Bang nucleosysnthesis models. There is currently a disagreement between measurements of the neutron lifetime made using the cold neutron beam method and ultracold neutron storage methods. A new measurement of the neutron lifetime ... More
Presented by Dr. Maynard DEWEY on 18 Oct 2016 at 09:30
Type: Oral Session: We - 2
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
While we have been longing for the signals of new physics beyond the standard model, there is no convincing indication yet at the high energy frontier, LHC. There is an increasing importance in exploring intensity and precision frontier especially to shape a possible new physics by further investigating the flavor dynamics and by testing symmetries in the nature. In this talk, we try to cover the ... More
Presented by Prof. Naohito SAITO on 19 Oct 2016 at 11:30
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
abstract is attached
Presented by Mr. Ryoto IWAI on 18 Oct 2016 at 18:29
Type: Poster Session: Poster Session
We present the status of gravity resonance spectroscopy (GRS): The neutron serves as a measuring tool and as an object for gravity research. We show that GRS allows to test Newton’s inverse square law at short distances and to search for dark matter and dark energy candidates. We use a method based on frequency measurements which have shown spectacular sensitivity in the past. Our method also by ... More
Presented by Mr. Tobias RECHBERGER on 18 Oct 2016 at 18:05
Type: Oral Session: Mo - 3
Track: Low energy precision tests of the Standard Model
The B factories have been built to study CP violation in the B-meson system and probe the flavor sector of the Standard Model (SM) via measurement of the elements of the Cabibbo-Kobayashi-Maskawa matrix. We present today recent results on CP violation in B- and D-meson decays obtained with the BABAR detector. Among these the first observation of mixing-induced CP violation in B0->D_CP(*)h0 dec ... More
Presented by Dr. Fabio ANULLI on 17 Oct 2016 at 15:30
Type: Oral Session: Mo - 2
Track: Searches for permanent electric dipole moments
The behavior of a spin undergoing Larmor precession in the presence of fluctuating fields is of interest to a variety of precision measurement experiments. The fluctuating fields cause frequency shifts and relaxation which according to Redfield theory are related to their power spectrum. Recently it was shown that scattering with energy exchange from an ensemble of scatterers in thermal equilibriu ... More
Presented by Dr. Christopher SWANK on 17 Oct 2016 at 12:20
Type: Oral Session: Tu - 4
Track: Low energy precision tests of the Standard Model
K+->pi+nunu is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branching ratio of this decay with 10% precision. NA62 took data in pilot runs in 2014 and 2015 reaching the final designed beam intensity. The quality of data acquired in view of the final measureme ... More
Presented by R. FANTECHI on 18 Oct 2016 at 17:00
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
The Pauli Exclusion Principle (PEP) is the foundation for our understanding of physics where systems of fermions are concerned. Therefore, it is important to make precision tests of the PEP. In a pioneering experiment, Ramberg and Snow supplied an electric current to a Cu target, and searched for PEP violating atomic transitions of the “fresh" electrons from the current. The non-existence of the ... More
Presented by Mr. Andreas PICHLER on 18 Oct 2016 at 17:53
Type: Oral Session: Th - 2
Track: Searches for symmetry violations and new forces
We report updates of experimental constraints on new gravity-like interactions by measuring the angular distribution of cold neutrons scattering off atomic xenon gas. The results improved previous upper limit on Yukawa-type parametrization space in the 4 to 0.04 nm range by a factor of up to 10[1]. We also discuss about our plans of a test of the weak equivalence principle and a new force search i ... More
Presented by Dr. Yoshio KAMIYA on 20 Oct 2016 at 12:00
Type: Oral Session: Mo - 4
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The ability of slow neutrons to interact coherently with macroscopic amounts of matter and with negligible decoherence opens an experimental window on certain aspects of beyond Standard Model physics. This talk will present results of some recent experiments which fit within this general category.
Presented by William SNOW on 17 Oct 2016 at 16:40
Type: Poster Session: Poster Session
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The NA48/2 experiment at CERN collected in 2003-2004 a large sample of charged kaon decays with multiple charged particles in the final state. A new upper limit on the rate of the lepton number violating decay K+- --> pi-+ mu+- mu+- obtained from this sample is reported. Searches for two-body resonances in the K+- -->pi mu mu decays (including heavy neutral leptons and inflatons) in the acces ... More
Presented by Cristina LAZZERONI, Dr. Riccardo FANTECHI on 18 Oct 2016 at 18:18
Type: Poster Session: Poster Session
The strong CP problem may be solved by turning the theta parameter into a dynamic field. Excitations of this field are axions, which are also good cold dark matter candidates. The nEDM experiments are sensitive to interactions with a background field of ultralight axions, which would appear as oscillations in the measured neutron electric dipole moment. This analysis presents the first laboratory ... More
Presented by Mr. Nicholas AYRES, Mr. Michał RAWLIK on 18 Oct 2016 at 17:56
Type: Oral Session: Th - 2
Track: Searches for symmetry violations and new forces
Axions, axion-like particles (ALPs), dilatons, and other ultralight (masses from 10-4 down to 10-23 eV) particles have been discussed as possible candidates for dark matter. An interesting feature of these ideas is that they lead to predictions of potentially observable transient and oscillating effects. I will describe how we are looking for these as well as the relation of such experiments to ... More
Presented by Prof. DMITRY BUDKER on 20 Oct 2016 at 11:00
Type: Poster Session: Poster Session
One class of gravity experiments within the qBounce project focuses on the realization of a Quantum Bouncing Ball, i.e. a measurement of the time evolution of a neutron bouncing above a horizontal plane. We have measured, the spatial probability distribution of this Schrödinger wave packet for different observation times with a spatial resolution of about 1.8μm. We illustrate the role ... More
Presented by Mr. Martin THALHAMMER on 18 Oct 2016 at 18:12
Type: Oral Session: Mo - 1
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
In this talk an overview of some recent spectroscopy measurements and planned activities in the field of exotic atoms will be presented. Exotic bound states such as muonic and pionic atoms, muonium, positronium and antiprotonic helium are systems which offer the possibility to test bound-state QED, to perform test of fundamental symmetries, to extract fundamental constants such as masses and cou ... More
Presented by Dr. Aldo ANTOGNINI on 17 Oct 2016 at 09:30
Session: Mo - 1
Presented by Joachim Kurt GRILLENBERGER on 17 Oct 2016 at 09:10
Type: Oral Session: Th - 1
Track: Low energy precision tests of the Standard Model
Observing atomic parity violation in atomic systems provides a unique possibility for testing the predictions of the Standard Model at low momentum transfer. The nuclear spin independent part of the weak interactions permits the extraction of the weak mixing angle or Weinberg angle. A sensitivity beyond the most sensitive determination of this parameter in atomic system, i.e. in a cesium atomic b ... More
Presented by Dr. Lorenz WILLMANN on 20 Oct 2016 at 10:00
Type: Poster Session: Poster Session
Ultra-cold Neutrons (UCN) are a very prominent tool in fundamental physics since they can be stored due to their low kinetic energy below 300 neV. The UCN source at PSI has been in operation since 2011. Fast neutrons, produced by guiding PSI's high intensity 590 MeV proton beam on a lead spallation target, are frst thermalized in D2O and then moderated into the cold regime using solid D2 (sD2) ... More
Presented by Nicolas HILD, on behalf of the UCN Team at PSI - on 18 Oct 2016 at 18:24
Type: Oral Session: Tu - 4
Track: Low energy precision tests of the Standard Model
A precision test of lepton universality in the leptonic decay ratio for positive kaons $R_K$ = $K_{e2}/K_{\mu2}$ has been carried out with stopped kaons at J-Parc by the TREK Collaboration (Experiment E36). The Standard Model (SM) prediction for $R_K$ is very precise with an uncertainty of $\Delta R_K/R_K $ = 4 x $10^{-4}$. An observed deviation from this would be an indication of New Physics bey ... More
Presented by Prof. Chaden DJALALI, Prof. Michael HASINOFF on 18 Oct 2016 at 17:20
Type: Oral Session: Mo - 2
Track: Searches for permanent electric dipole moments
A permanent non-zero electric dipole moment (nEDM) violates CP-symmetry. Beyond Standard Model theories predict nEDMs very close to the current upper limit of 3x10^(-26)ecm. Those predictions result from CP-violating processes, which in turn can be related to the matter-antimatter asymmetry observed in our universe. Thus the search for an nEDM contributes to understanding the Baryon asymmetry, as ... More
Presented by Dr. Beatrice FRANKE on 17 Oct 2016 at 12:00
Type: Oral Session: Tu - 3
Track: Searches for permanent electric dipole moments
Storage ring proton EDM experiment aims to search for $10^{-29}$ e$\cdot$cm sensitivity. The experiment is designed for two polarized counter-rotating beams to be stored at magic momentum inside an all-electric ring for 1000 seconds, and $10^4$ injections. Simulations show that some ring designs easily lead to 1000 seconds of spin coherence time. Besides, the magnetic field as well as the geometri ... More
Presented by Dr. Selcuk HACIOMEROGLU on 18 Oct 2016 at 15:30
Type: Poster Session: Poster Session
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The neutron absorption in eV region is dominated by capture process via well-resolved compound states. The breaking of the spatial inversion symmetry is known to be largely enhanced in p-wave compound resonances according to the interference in the entrance channel between neighboring resonances with different angular momentum of incident neutrons. The entrance-channel interference naturally ... More
Presented by Prof. Hirohiko SHIMIZU on 18 Oct 2016 at 18:35
Type: Oral Session: Mo - 4
Track: Advanced muon and ultracold neutron sources
Conversion of cold to ultracold neutrons (UCNs) via single-phonon emission in superfluid helium has been proposed forty years ago by Golub and Pendlebury as a viable mechanism to achieve high densities of UCNs at the end of a neutron guide. Building on practical experience from two prototypes based on this mechanism, and able to provide UCNs to user experiments at room temperature, the new UCN sou ... More
Presented by Prof. Oliver ZIMMER on 17 Oct 2016 at 17:30
Type: Poster Session: Poster Session
Atomic spectroscopy has evolved considerably in recent years and it is passed from the stage of just a confirmation experiment of atomic theories to that of an indicator for new paths to understand the nature, as has been demonstrated by the results of R. Pohl et al., Nature 466, 213 (2010) and A. Antognini et al., Science 339, 417 (2013). We use the experimental results of the spectroscopy of hyd ... More
Presented by Dr. Mustafa MOUMNI on 18 Oct 2016 at 18:13
Type: Oral Session: Mo - 1
Track: Low energy precision tests of the Standard Model
Hydrogenic systems like H, $\mu$H, muonium, and positronium are being considered for the determination of fundamental physical constants and for low-energy tests of the Standard Model. The precision of these tests, however, is limited either by a short natural life-time or by uncertainties in the nuclear structure. Additionally, the mean square charge radius observed for the proton structure in ... More
Presented by Prof. Krzysztof PACHUCKI on 17 Oct 2016 at 10:00
Type: Oral Session: Th - 1
Track: Searches for symmetry violations and new forces
Precise measurements of observables in beta decay allow testing the symmetries of the Standard Model or searching for physics beyond at the low-energy and high-intensity frontier. A non-exhaustive overview of this field will be presented based on selected state-of-the-art measurements using a variety of techniques. With the precision of these measurements reaching the per mille level small Sta ... More
Presented by Prof. Nathal SEVERIJNS on 20 Oct 2016 at 09:00
Session: Th - 3
Presented by Dr. Satoshi MIHARA on 20 Oct 2016 at 14:30
Type: Oral Session: Mo - 2
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
In this talk, we present an overview of the science program at the Los Alamos spallation-driven solid-deuterium ultra-cold neutron (UCN) source, describe the performance of the source, and give the status of the source upgrade now underway. Experiments in operation or development include the UCNTau neutron lifetime experiment, UCNB/Nab detector development for measurement of neutron beta decay par ... More
Presented by Alexander SAUNDERS on 17 Oct 2016 at 11:00
Type: Oral Session: Th - 3
Track: Low energy precision tests of the Standard Model
The Mu2e Experiment at Fermilab will search for coherent, neutrinoless conversion of muons into electrons in the field of a nucleus with a sensitivity improvement of a factor of 10,000 over previous experiments. Such a charged lepton flavor-violating reaction probes new physics at a scale inaccessible with direct searches at either present or planned high energy colliders. The experiment both ... More
Presented by Andrei GAPONENKO on 20 Oct 2016 at 15:30
Type: Oral Session: Th - 3
Track: Low energy precision tests of the Standard Model
The Mu3e experiment at PSI searches for the lepton flavour violating decay of the positive muon to two positrons and an electron, aiming for a sensitivity of 1 in 10^16 muon decays. This requires a novel detector concept based on ultra thin high-voltage monolithic active pixel sensors (HV-MAPS) complemented by scintillating fibres and tiles for precise timing measurements. The poster will discuss ... More
Presented by Dr. Niklaus BERGER on 20 Oct 2016 at 15:50
Type: Oral Session: We - 3
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Using a unique cryogenic time projection chamber as an active stopping target, the MuSun experiment has acquired the $10^{10}$ fully reconstructed muon decay events necessary to measure the rate of muon capture on the deuteron to better than 1.5\% precision. Once completed, the analysis will lead to a benchmark result in calibrating weak interactions in the two nucleon system, relevant for calcula ... More
Presented by Ms. Rachel RYAN on 19 Oct 2016 at 15:00
Type: Oral Session: Tu - 1
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
The aSPECT retardation spectrometer measures the beta−neutrino angular correlation coefficient a in free neutron-decay. This measurement can be used to determine the ratio gA/gV of the weak coupling constants, as well as to search for physics beyond the Standard Model. In 2013 aSPECT had a successful beam time at the Institut Laue-Langevin. The goal of this beam time is to improve the current u ... More
Presented by Dr. Marcus BECK on 18 Oct 2016 at 10:10
Type: Poster Session: Poster Session
The aSPECT retardation spectrometer measures the beta−neutrino angular correlation coefficient a in free neutron beta-decay. This measurement can be used to determine the ratio gA/gV of the weak coupling constants, as well as to search for physics beyond the Standard Model. In 2013 aSPECT had a successful beam time at the Institut Laue-Langevin. The goal of this beam time is to improve the curr ... More
Presented by Mr. Christian SCHMIDT on 18 Oct 2016 at 18:21
Type: Poster Session: Poster Session
The aSPECT retardation spectrometer measures the beta-neutrino angular correlation coefficient a in free neutron beta decay. This measurement can be used to determine the ratio g_A/g_V of the weak coupling constants, as well as to search for physics beyond the Standard Model. In spring/summer 2013 aSPECT had a successful beam time at the Institut Laue-Langevin. The goal of this beam time is to im ... More
Presented by Mr. Alexander WUNDERLE on 18 Oct 2016 at 18:22
Type: Poster Session: Poster Session
The MEG experiment has recently established the most stringent upper limit on the branching fraction of the mu -> e gamma decay (< 4.2 x 10e-13 at 90% C.L.). It is a factor 30 improvement over the previous limit set by the MEGA experiment and also the strongest bound on any forbidden decay particle. An upgrade of the experiment is ongoing aiming at a better sensitivity by an order of magnitude. On ... More
Presented by Angela PAPA on 18 Oct 2016 at 18:20
Type: Poster Session: Poster Session
The Mu3e Scintillating Fibre (SciFi) detector is a cylindrical time of flight (ToF) device which complements the central silicon tracking system. It consists of a scintillating fibre (SciFi) hodoscope with a radius of 6 cm and a length of 36 cm. The expected time resolution is of several 100 ps and a detection efficiency close to 100% is foreseen. The main purpose of the ToF system is to measure p ... More
Presented by Angela PAPA on 18 Oct 2016 at 18:19
Type: Oral Session: Th - 3
Track: Low energy precision tests of the Standard Model
Lepton flavor violation (LFV) research is currently one of the most exciting branches of particle physics due to its high sensitivity to new physics. The observation of neutrino oscillations has clearly demonstrated that neutral lepton flavor is not conserved. This implies that charged LFV (cLFV) processes, such as the mu+ -> e+ gamma decay, can also occur in the Standard Model (SM), although str ... More
Presented by Angela PAPA on 20 Oct 2016 at 16:10
Type: Oral Session: We - 2
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
I will present recent developments in the Standard Model prediction of the muon g-2 and the long-standing discrepancy with its measured value
Presented by Prof. Massimo PASSERA on 19 Oct 2016 at 11:00
Type: Poster Session: Poster Session
The decay of the free neutron into a proton, electron and antineutrino is the prototype of semi-leptonic weak decays and plays a key role in particle physics and astrophysics. The most precise measurement of the neutron lifetime to date use ultra-cold neutrons (UCN) stored in material vessels. Their accuracy is limited by systematic errors, mainly caused by anomalous losses of UCN during storage a ... More
Presented by Mr. Jan Peter KARCH on 18 Oct 2016 at 18:09
Type: Poster Session: Poster Session
The neutron Electric Dipole Moment experiment at the Paul Scherrer Institute is currently the most sensitive in the world. One of the main improvements that made this possible is the new algorithm that was developed to optimise the magnetic field. Using a combination of both offline magnetic field maps and online monitoring with an array of Cs magnetometers, the currents applied to a set of 30 c ... More
Presented by Ms. Elise WURSTEN on 18 Oct 2016 at 17:48
Type: Oral Session: Mo - 2
Track: Searches for permanent electric dipole moments
For more than fifty years physicists have tried to measure the electric dipole moment of the neutron (nEDM). The limit on the nEDM has become smaller and smaller, but at present its value remains consistent with zero. However, the Standard Model of particle physics predicts a small non-zero value, as do the various extensions of the Standard Model. The predictions span several orders of magnit ... More
Presented by Ms. Elise WURSTEN on 17 Oct 2016 at 12:40
Type: Poster Session: Poster Session
Thin scintillating fibers of 250 μm size coupled to silicon photomultipliers form the basis of a fast, versatile and modular detector technology usable in magnetic fields and vacuum. In view of the upcoming cLFV experiments MEGII and Mu3e, we will present its application for the purpose of beam monitoring and timing measurement. The challenge of these detectors lies in the ability to detect minim ... More
Presented by Giada RUTAR on 18 Oct 2016 at 17:40
Type: Oral Session: Mo - 4
Track: Low energy precision tests of the Standard Model
Time Reversal Invariance Violating (TRIV) effects in neutron transmission through a nuclei target are discussed. We explore the possibility to search TRI violation using two important advantages of neutron nuclei interactions: the possibility of the enhancement of TRIV observables by many orders of magnitude, and the relatively large number of the nuclear targets, which provides the assurance of a ... More
Presented by Prof. Vladimir GUDKOV on 17 Oct 2016 at 17:10
Type: Poster Session: Poster Session
Laser cooling and trapping techniques enjoy a solid reputation as powerful and elegant providers of well-localized, backing-free sources. Not only does this hold true within the atomic physics and quantum optics communities, but also beyond. Most notably, these techniques have recently joined the toolbox of low-energy, high-precision tests of the Standard Model. Our work with argon falls within th ... More
Presented by Ms. Florence LENAERS on 18 Oct 2016 at 18:08
Type: Poster Session: Poster Session
Track: Low energy precision tests of the Standard Model
The Mu3e experiment is designed to search for the lepton flavour violating decay $\mu^+ \rightarrow e^+e^-e^+. The first phase of the experiment will be performed at the piE5 beam line at the Paul-Scherrer Institute providing $10^8$ muons per second, allowing to reach the sensitivity of $10^{-15}$. The muons are stopped and decay at rest on a target that is placed inside two double layers of \SI{5 ... More
Presented by Dr. Alexandr KOZLINSKIY on 18 Oct 2016 at 17:45
Type: Oral Session: We - 4
Track: Searches for permanent electric dipole moments
The effect of two-crystal focusing of neutrons at Laue diffraction from large perfect silicon crystals has been studied. This experiment was done at the framework of the project to test the neutron electroneutrality by new technique using the combination of spin-interferometry method SESANS (Spin Echo Small Angle Neutron Scattering) with the Laue diffraction in perfect crystal. It has been shown ... More
Presented by Dr. Vladimir VORONIN on 19 Oct 2016 at 17:50
Type: Oral Session: Tu - 1
Track: Low energy precision tests of the Standard Model
Recent measurements of the neutron lifetime have individually reported uncertainties of about 1 s but disagree by as much 7 s, resulting in a shift of about 6.5 sigma in the accepted value over recent years. Measurements based on the decay in flight of cold neutron beams appear to yield longer lifetimes than those based on counting surviving ultra-cold neutrons after storage in material-walled tra ... More
Presented by Dr. Christopher MORRIS on 18 Oct 2016 at 09:50
Type: Oral Session: We - 4
Track: Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Due to their outstanding property to be storable and hence observable for long periods of time (several hundreds of seconds) in suitable material or magnetic traps, ultra-cold neutrons (UCN) with energies around 100 neV are an unique tool to study fundamental properties of the free neutron. The ultracold neutron (UCN) and very cold neutron (VCN) facility PF2 (Physique Fondamentale 2) is one of tw ... More
Presented by Dr. Peter GELTENBORT on 19 Oct 2016 at 16:40
Type: Poster Session: Poster Session
The MEG II experiment is an upgrade of the MEG experiment to search for the charged lepton flavor violating decay of muon, $\mu^+ \rightarrow e^+ \gamma $. The performance of the liquid xenon (LXe) γ-ray detector will be greatly improved with a highly granular scintillation readout realized by replacing 216 photomultiplier tubes (PMTs) on the γ-ray entrance face with 4092 Mult i-Pixel Ph ... More
Presented by Mr. Shinji OGAWA on 18 Oct 2016 at 17:43
Session: Mo - 1
Presented by Klaus Stefan KIRCH on 17 Oct 2016 at 09:00
Type: Poster Session: Poster Session
Track: Advanced muon and ultracold neutron sources
We are developing a novel mu+ beamline that reduces the phase space of the input beam by a factor of 10E10 with 10E-3 efficiency. The phase space compression is achieved by stopping mu+ in cryogenic helium gas and applying strong electric and magnetic fields and gas density gradients. The beamline consists of several consecutive stages, which can be tested individually in the first step. The tr ... More
Presented by Ivana BELOSEVICH on 18 Oct 2016 at 18:57
Type: Oral Session: We - 4
Track: Searches for symmetry violations and new forces
This talk focuses on the control and understanding of a gravitationally interacting elementary quantum system using the techniques of resonance spectroscopy. It offers a new way of looking at gravitation at short distances based on quantum interference. The ultra-cold neutron reflects from a mirror in well-defined quantum states in the gravity potential of the earth allowing the application of gra ... More
Presented by Hartmut ABELE on 19 Oct 2016 at 17:00