Physics of fundamental Symmetries and Interactions - PSI2010

Session

Session We - 4

3 - 4

13 Oct 2010, 16:40

Main Auditorium (WHGA/001) (PSI)

85. EDM project at KEK-RCNP and TRIUMF

Prof. Yasuhiro Masuda Masuda (Institute of Particle and Nuclear Studies, KEK)

13/10/2010, 16:40

Searches for permanent electric dipole moments

Oral

We have constructed a spallation UCN source of superfluid helium at RCNP. We obtained a world competitive UCN density at a proton beam power of 1 micro A and 390 MeV. By using this UCN source we will measure nEDM. We will discuss the present status of the UCN source and the preparation of EDM measurement. We will also discuss the future possibility at TRIUMF.

84. Test of Gravitation with Quantum Objects

Hartmut Abele (Atominstitut)

13/10/2010, 17:00

Fundamental physics with cold and ultracold neutrons

Oral

This talk is about a test of gravitation at small distances by quantum interference deep into the theoretically interesting regime of 10000 times gravity. The method allows a precise measurement of quantum mechanical phase shifts of a Schrödinger wave packet bouncing off a hard surface in the gravitational field of the earth. The experiment is sensitive to gravity-like forces at a length scale...

25. Precision measurements of the beta-asymmetry parameter in nuclear beta decay as a probe for tensor-type weak currents.

Dr Frederik Wauters (IKS - Kaholieke Universiteit Leuven)

13/10/2010, 17:20

Low energy precision tests of the Standard Model

Oral

Correlation measurements in nuclear and neutron beta-decay are a powerful tool to probe the structure of the weak [Sev2006]. While neutron decay experiments mainly focus on the determination of the V_ud matrix element[Abe2008], correlation experiments in nuclear beta-decay concentrate on exotic weak interaction types [Beh2009][Sev2006]. The main advantage of nuclear beta-decays is the wide...

28. WITCH: a Precision Experiment for Weak Interaction Studies

Martin Breitenfeldt (Katholieke Universiteit Leuven)

13/10/2010, 17:40

Low energy precision tests of the Standard Model

Oral

The WITCH set-up (Weak Interaction Trap for CHarged particles) that was installed at ISOLDE/CERN combines a double Penning trap system to store radioactive ions and a retardation spectrometer to probe the energy of the daughter recoil ions. The primary aim is to search for scalar and/or tensor interactions in nuclear beta decay by precisely determining the beta-neutrino angular correlation...

41. Measurement of the beta-neutrino angular correlation in the decay of trapped $^6$He$^+$ ions

Dr Xavier Flechard (LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, Caen, France)

13/10/2010, 18:00

Low energy precision tests of the Standard Model

Oral

Within the frame of the Standard Model, the weak interaction is mediated by the W+, W-, and Z0 bosons, which can only involve vector and axial vector interactions. The precise measurement of the beta-neutrino angular correlation, $a_{\beta\nu}$, in nuclear beta decay is a direct and sensitive tool to search for other Lorentz invariant contributions, such as Tensor and Scalar couplings....