Physics of fundamental Symmetries and Interactions - PSI2013

Session

Mo - 2

9 Sept 2013, 11:00

Conveners

Mo - 2

• Session Chair: Peter Kammel

20. Light muonic atoms in search of new interactions at the Compton wavelength scale

Prof. Krzysztof Pachucki (Institute of Theoretical Physics, University of Warsaw)

09/09/2013, 11:00

Oral

Assuming validity of electronic and muonic hydrogen experiments and assuming universality of lepton interactions, it is plausible to expect an unknown yet interaction at the range of the electron Compton wavelength. There are accurate measurements in search for such forces at larger distances, like that with the molecular hydrogen, H$_2^+$ or antiprotonic helium, but muonic hydrogen is the...

101. Cosmic Ray Radiography

Dr Christopher Morris (Los Alamos)

09/09/2013, 11:25

Oral

Abstract Transmission radiography using cosmic ray muons is a technique first used in the 1950’s by E.P.George[1] to measure the overburden of mine shafts, and most famously by Alvarez[2] to search for hidden chambers in the second pyramid of Chephren in Gaza. The high penetrating power of near horizontal cosmic ray muons has even been utilized in radiographing volcanoes.[3] The high...

97. The Muon g-2 Experiment at Fermilab

Prof. Lawrence Gibbons (Cornell University)

09/09/2013, 11:50

Oral

The Muon g-2 experiment at Fermilab will build upon the work of its predecessors at CERN and Brookhaven to measure the anomalous magnetic moment of the muon, a_mu, to 0.14 ppm. With this factor of four improvement in precision over the statistically-limited Brookhaven E821 experiment, we will test the 3.6 $\sigma$ discrepancy between the Standard Model (SM) theory prediction and experimental...

46. Kaonic atoms – high precision studies on the low-energy antikaon interaction

Tomoichi Ishiwatari

09/09/2013, 12:15

Oral

The antikaon interaction on nucleons and nuclei in the low-energy regime is a challenging research field in experiment and theory. Now new precise data are available from x-ray spectroscopy of the lightest hadronic atoms with strangeness, i.e. kaonic hydrogen and helium isotopes. From the measurement of the x-ray transitions to low-lying levels by SIDDHARTA at DAFNE/Frascati the up-to-now most...

88. First Determination of the Proton’s Weak Charge – Early results from Qweak

Prof. Allena Opper (The George Washington University)

09/09/2013, 12:35

Oral

The Qweak experiment was designed to exploit the small parity violating asymmetry in elastic ep scattering to make the first direct measurement of the proton’s weak charge, $Q_W^p$, and measure the running of the weak mixing angle, $sin^2q_w$, at low $Q^2$. The Standard Model predicts the proton’s weak charge, based on the running of the weak mixing angle from the $Z_0$ pole to low energies....