Physics of fundamental Symmetries and Interactions - PSI2013

Session

We - 4

11 Sept 2013, 16:20

Conveners

We - 4

• Session Chair: Klaus Jungmann (University of Groningen)

38. Low-energy precision measurements at the intensity frontier

Prof. Nathal Severijns (Katholieke Univ. Leuven)

11/09/2013, 16:20

Oral

Measurements of observables in nuclear beta decay and neutron decay continue to provide important information on the structure and symmetries of the weak interaction at low energy. Here the focus will be on state-of-the-art precision measurements in nuclear beta decay using a variety of techniques, many of which are based on ion and atom traps. A large number of experiments is currently...

10. The limits on tensor-type weak currents and the beta-neutrino correlation of 6He

Dr Frederik Wauters (Center for Experimental Nuclear Physics and Astrophysics)

11/09/2013, 16:50

Low energy precision tests of the Standard Model

Oral

Precision measurements in nuclear and neutron beta decays are a powerful tool in search for non V-A components in the weak interaction. Such a chirality-violating scalar or tensor interaction is predicted by several theories beyond Standard Model (e.g. [1][2]). We will present a new evaluation of the limits on time-reversal invariant tensor-type weak currents [3], taking into account most...

48. Probing the Standard Model via 35Ar beta decay with the WITCH spectrometer

Dr A. Finlay (Instituut voor Kern- en Stralingsfysica, K.U. Leuven)

11/09/2013, 17:10

Oral

High-precision measurements of weak-interaction observables offer a powerful probe of physics beyond the Standard Model complementary to that provided by direct searches at colliders like the LHC. In particular, beta-decay kinematic correlation measurements can be sensitive to the presence of scalar and tensor current interactions, which are assumed to be absent in the standard electroweak...

44. Gravitational four-fermion interaction and dynamics of the early Universe

Prof. Iosif Khriplovich (Budker Institute of Nuclear Physics, Novosibirsk)

11/09/2013, 17:30

Oral

If torsion exists, it generates gravitational four-fermion interaction (GFFI), essential on the Planck scale. We analyze the influence of this interaction on the Friedmann-Lemaitre-Robertson-Walker cosmology. Explicit analytical solution is derived for the problem where both the energy-momentum tensor generated by GFFI and the common ultrarelativistic energy-momentum tensor are included....

9. New method for checking a neutron electroneutrality by spin interferometry technique

Dr Vladimir Voronin (Petersburg Nuclear Physics Institute)

11/09/2013, 17:50

Oral

New approach for checking neutron electroneutrality is proposed. The main idea is to use the spin interferometry technique SESANS (Spin Echo Small Angle Neutron Scattering). This technique provide a spatial splitting of neutron on two eigenstates with different projection of spin to the magnetic field. After passing through the working area these two eigenstates are coupled back by the...