Joachim Kurt Grillenberger
(Paul Scherrer Institut)
17/10/2016, 09:10
Dr
Aldo Antognini
(Paul Scherrer Institute and ETHZ, Switzerland)
17/10/2016, 09:30
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Krzysztof Pachucki
(Institute of Theoretical Physics, University of Warsaw)
17/10/2016, 10:00
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...
Alexander Saunders
(Los Alamos National Lab)
17/10/2016, 11:00
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Michael Ramsey-Musolf
(U. Massachusetts Amherst)
17/10/2016, 11:30
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...
Dr
Beatrice Franke
(TRIUMF, Vancouver, Canada)
17/10/2016, 12:00
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...
Dr
Christopher Swank
(Caltech)
17/10/2016, 12:20
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...
Ms
Elise Wursten
(KU Leuven)
17/10/2016, 12:40
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...
Prof.
Gerald Gabrielse
(Harvard University)
17/10/2016, 14:30
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...
Prof.
Holger Müller
(UC Berkeley)
17/10/2016, 15:00
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...
Dr
Fabio Anulli
(INFN Rome)
17/10/2016, 15:30
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...
Dr
Paolo Crivelli
(ETH Zurich, Institute for Particle Physics)
17/10/2016, 15:50
We report the status of our experiments aiming to improve the determination of the 1S-2S transition frequency of positronium and muonium atoms.
William Snow
(Indiana University)
17/10/2016, 16:40
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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.
Prof.
Vladimir Gudkov
(University of South Carolina)
17/10/2016, 17:10
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...
Prof.
Oliver Zimmer
(Institut Laue Langevin)
17/10/2016, 17:30
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...
Torsten Soldner
(Institut Laue Langevin)
17/10/2016, 17:45
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Dr
Florian Piegsa
(ETH Zürich)
17/10/2016, 18:00
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,...
Gustaaf Brooijmans
(Columbia University)
17/10/2016, 18:15
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...
Prof.
Zurab Berezhiani
(Univ. L'Aquila and Gran Sasso National Laboratories)
18/10/2016, 09:00
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...
Dr
Maynard Dewey
(NIST)
18/10/2016, 09:30
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Dr
Christopher Morris
(Los Alamos)
18/10/2016, 09:50
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...
Dr
Marcus Beck
(for the aSPECT collaboration - Helmholtz-Institut Mainz and Johannes Gutenberg Universität Mainz)
18/10/2016, 10:10
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Klaus Blaum
(Max Planck Institut für Kernphysik)
18/10/2016, 11:00
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...
Prof.
Frank Maas
(Helmholtz Institute Mainz, GSI and Mainz University)
18/10/2016, 11:30
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...
Dr
Paul Moch
(Universität Siegen)
18/10/2016, 12:00
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...
Tatsuhiko Tomita
(Kyushu University)
18/10/2016, 12:20
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Joerg Jaeckel
(ITP Heidelberg)
18/10/2016, 14:30
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.
Nadia Fomin
(University of Tennessee)
18/10/2016, 15:00
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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)...
Dr
Selcuk Haciomeroglu
(Institute for Basic Science, Korea)
18/10/2016, 15:30
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...
Prof.
Martin Fertl
(University of Washington)
18/10/2016, 16:20
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...
Dr
Giulia Brunetti
(Fermilab)
18/10/2016, 16:40
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...
Prof.
Chaden Djalali
(University of Iowa), Prof.
Michael HASINOFF
(Univ of British Columbia)
18/10/2016, 17:20
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...
Mr
Noah Birge
(University of Tennessee, Knoxville)
18/10/2016, 17:42
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...
Mr
Shinji Ogawa
(The University of Tokyo)
18/10/2016, 17:43
Poster
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...
Dr
Kei Ieki
(University of Tokyo)
18/10/2016, 17:44
Poster
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...
Dr
Alexandr Kozlinskiy
(Mainz University KPH)
18/10/2016, 17:45
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...
Ms
XUEYING Huyan
(National Superconducting Cyclotron Laboratory/Michigan State University)
18/10/2016, 17:46
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...
Dr
Gertrud Konrad
(SMI Wien & Atominstitut)
18/10/2016, 17:47
Poster
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 the...
Ms
Elise Wursten
(KU Leuven)
18/10/2016, 17:48
Poster
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...
Dr
Jacek Zejma
(JUC), Dr
Jochen Krempel
(ETH Zürich), Mr
Michał Rawlik
(ETH Zürich)
18/10/2016, 17:49
Poster
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...
191.
Development of a double-cusp trap for ground-state hyperfine spectroscopy of antihydrogen atoms
Dr
Naofumi Kuroda
(University of Tokyo)
18/10/2016, 17:50
Poster
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...
203.
Development of the measurement system toward the electron EDM search with laser cooled Fr atoms
Dr
Takeshi Inoue
(Tohoku University)
18/10/2016, 17:51
Poster
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...
Mr
Alexander Rischka
(Max-Planck-Insitute für Kernphysik), Ms
Rima Schüssler
(Max-Planck-Insitute für Kernphysik)
18/10/2016, 17:52
Poster
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...
Mr
Andreas Pichler
(Stefan Meyer Insitute)
18/10/2016, 17:53
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...
Yasuhiro Ueno
(University of Tokyo)
18/10/2016, 17:54
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Poster
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...
Mr
Leendert Hayden
(Instituut voor Kern- en Stralingsfysica, KU Leuven, Belgium)
18/10/2016, 17:55
Poster
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...
Mr
Michał Rawlik
(ETH Zürich), Mr
Nicholas Ayres
(University of Sussex)
18/10/2016, 17:56
Poster
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...
Ms
Aiko Uchiyama
(Tohoku University)
18/10/2016, 17:57
Poster
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...
Dr
Georg Bison
(Paul Scherrer Institut)
18/10/2016, 17:58
Poster
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...
Dr
Tobias JENKE
(Institut Laue-Langevin)
18/10/2016, 17:59
Poster
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...
Zachary Donovan Hodge
(Paul Scherrer Institut)
18/10/2016, 18:00
Poster
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...
Elizabeth Mae Scott
(University of Tennessee)
18/10/2016, 18:01
Poster
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...
Mr
Narongrit Ritjoho
(PhD at Paul Scherrer Institut)
18/10/2016, 18:02
Poster
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...
Dr
Wolfgang Schott
(TUM)
18/10/2016, 18:03
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Poster
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...
Mr
Kosuke Sakamoto
(Tohoku University)
18/10/2016, 18:04
Poster
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...
Mr
Tobias Rechberger
(Atominstitut, TU Wien)
18/10/2016, 18:05
Poster
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...
Zachary Donovan Hodge
(Paul Scherrer Institut)
18/10/2016, 18:06
Poster
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...
Mr
Yannick Ulrich
(PSI / UZH)
18/10/2016, 18:07
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...
Ms
Florence Lenaers
(Université de Liège)
18/10/2016, 18:08
Poster
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...
Mr
Jan Peter Karch
(Institute of Physics, University of Mainz)
18/10/2016, 18:09
Poster
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...
Dr
Romain Maisonobe
(Institut Laue-Langevin)
18/10/2016, 18:10
Poster
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...
Ms
Sybille Komposch
(ETHZ)
18/10/2016, 18:11
Poster
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...
Mr
Martin Thalhammer
(Atominstitut TU-Wien)
18/10/2016, 18:12
Poster
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...
Dr
Mustafa MOUMNI
(University of Biskra; Algeria)
18/10/2016, 18:13
Poster
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...
Dr
Shao-Feng Ge
(Max-Planck-Institut fuer Kernphysik, Germany)
18/10/2016, 18:14
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...
Dr
Tomoya Sato
(Department of Physics, Tokyo Institute of Technology; RIKEN Nishina Center for Accelerator-Based Science)
18/10/2016, 18:15
Poster
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...
Cristina Lazzeroni
(University of Birmingham, UK)
18/10/2016, 18:16
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Poster
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....
Dr
Tomoko Ariga
(University of Bern)
18/10/2016, 18:17
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 ->...
Cristina Lazzeroni
(University of Birmingham, UK), Dr
Riccardo Fantechi
(CERN EP and INFN Pisa)
18/10/2016, 18:18
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Poster
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...
Angela Papa
(Paul Scherrer Institute)
18/10/2016, 18:19
Poster
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...
Angela Papa
(Paul Scherrer Institute)
18/10/2016, 18:20
Poster
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...
Mr
Christian Schmidt
(Institute of Physics, Uni Mainz)
18/10/2016, 18:21
Poster
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...
Mr
Alexander Wunderle
(Johannes Gutenberg-Universität Mainz)
18/10/2016, 18:22
Poster
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...
Torsten Soldner
(Institut Laue Langevin)
18/10/2016, 18:23
Poster
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...
Nicolas Hild,
on behalf of the UCN Team at PSI -
(PSI)
18/10/2016, 18:24
Poster
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...
Dr
Wesley Gohn
(University of Kentucky)
18/10/2016, 18:25
Poster
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...
Esben Klinkby
(DTU / ESS)
18/10/2016, 18:26
Poster
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...
Dr
Naritoshi Kawamura
(KEK)
18/10/2016, 18:27
Poster
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...
Mr
Romain Virot
(Institut Laue-Langevin)
18/10/2016, 18:28
Poster
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...
Ms
Miki Nishimura
(The University of Tokyo)
18/10/2016, 18:30
Poster
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 part...
Prof.
Niklaus Berger
(Mainz University, Nuclear Physics)
18/10/2016, 18:31
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Poster
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...
Mr
Nicholas Christopher
(TRIUMF UCN Collaboration)
18/10/2016, 18:32
Poster
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....
Mr
Felix Anton Berg
(PSI)
18/10/2016, 18:33
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,...
Dr
Malgorzata Kasprzak
(Kath. Univ. Leuven)
18/10/2016, 18:34
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.
Prof.
Hirohiko Shimizu
(Nagoya University)
18/10/2016, 18:35
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Poster
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...
Dr
Jochen Krempel
(ETH Zürich)
18/10/2016, 18:36
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...
Mr
Christoph Roick
(TU Muenchen)
18/10/2016, 18:37
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...
Dr
Frederik Wauters
(Johannes Gutenberg-Universität Mainz)
18/10/2016, 18:38
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...
Dr
Yury Valdau
(Pax collaboration)
18/10/2016, 18:50
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...
Prof.
A.N. Ivanov
(TU Wien)
18/10/2016, 18:51
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...
Ivana Belosevich
(Inst. for Particle Physics, ETH Zurich)
18/10/2016, 18:57
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....
Jacob Thorne
(Univ. of Sussex)
18/10/2016, 18:58
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...
Dr
Makoto Fujiwara
(TRIUMF)
19/10/2016, 09:30
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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]....
Dr
Chloé Malbrunot
(CERN)
19/10/2016, 09:50
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...
Dr
Christian Smorra
(CERN)
19/10/2016, 10:10
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Massimo Passera
(INFN)
19/10/2016, 11:00
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
I will present recent developments in the Standard Model prediction of the muon g-2 and the long-standing discrepancy with its measured value
Prof.
Naohito SAITO
(J-PARC / KEK)
19/10/2016, 11:30
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Mr
Julian J. Krauth
(MPQ Garching)
19/10/2016, 12:00
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...
Dr
Dai Tomono
(Osaka University)
19/10/2016, 12:20
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Dr
Matteo Fael
(Bern Universität)
19/10/2016, 12:40
Oral
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 for the energy...
Prof.
David Hertzog
(University of Washington)
19/10/2016, 14:30
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Ms
Rachel Ryan
(University of Washington)
19/10/2016, 15:00
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Masahiko Iwasaki
(RIKEN)
19/10/2016, 15:20
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Dr
Glen Marshall
(TRIUMF)
19/10/2016, 15:50
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...
Dr
Peter Geltenbort
(Institut Laue-Langevin)
19/10/2016, 16:40
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Hartmut Abele
(Atominstitut)
19/10/2016, 17:00
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...
Dr
Ekaterina Korobkina
(NC State University)
19/10/2016, 17:30
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...
Dr
Vladimir Voronin
(Petersburg Nuclear Physics Institute)
19/10/2016, 17:50
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...
Prof.
Valery Fedorv
(PNPI NRC KI)
19/10/2016, 18:10
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Nathal Severijns
(Katholieke Univ. Leuven)
20/10/2016, 09:00
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...
Prof.
Werner Heil
(Institute of Physics)
20/10/2016, 09:30
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...
Dr
Lorenz Willmann
(Van Swinderen Institute, Groningen University)
20/10/2016, 10:00
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...
Prof.
DMITRY BUDKER
(Helmholtz Institute Mainz)
20/10/2016, 11:00
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...
Dr
Yoshio Kamiya
(International Center for Elementary Particle Physics, The University of Tokyo)
20/10/2016, 12:00
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...
Dr
Jonathan Wexler for the Nab & UCNB Collaborations
(North Carolina State University)
20/10/2016, 12:20
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Alexander Komives
(DePauw University)
20/10/2016, 12:40
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Oral
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...
Prof.
Maxim Pospelov
(Perimenter Institute / Univ. of Victoria)
20/10/2016, 15:00
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...
Andrei Gaponenko
(Fermilab)
20/10/2016, 15:30
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...
Dr
Niklaus Berger
(Mainz University, Nuclear Physics)
20/10/2016, 15:50
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...
Angela Papa
(Paul Scherrer Institut)
20/10/2016, 16:10
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...
Dr
Renat Sultanov
(BCRL at St. Cloud State University)
Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
Poster
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.
