Oct 16 – 20, 2016
Europe/Zurich timezone

Measurement of the weak magnetism form factor in 6He decay

Oct 18, 2016, 5:46 PM
1m
Poster Low energy precision tests of the Standard Model Poster Session

Speaker

Ms XUEYING Huyan (National Superconducting Cyclotron Laboratory/Michigan State University)

Description

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 calculated accurately and, since the 6He ground state is member of an isospin triplet, hadronic contributions to the weak currents can be calculated using CVC. In this contribution we describe an experiment, performed at the National Superconducting Cyclotron Laboratory, that measures the shape of the beta energy spectrum in 6He decay. The technique is based on the implantation of the nuclei of interest in suitable detectors, eliminating thereby the major systematic ect in such measurements related to the back-scattering of beta particles in surrounding matter and detectors. The first goal is to measure the weak magnetism form factor, which has never been measured in 6He decay, and which will provide a sensitivity test of the technique. The status of the data analysis will be presented.

Primary author

Ms XUEYING Huyan (National Superconducting Cyclotron Laboratory/Michigan State University)

Co-authors

Prof. ALEXANDRA Gade (National Superconducting Cyclotron Laboratory/Michigan State University) Prof. ANNA SIMON (University of Notre Dame) Dr DANIEL BAZIN (National Superconducting Cyclotron Laboratory) Dr DIRK WEISSHAAR (National Superconducting Cyclotron Laboratory) Dr Kei MINAMISONO (National Superconducting Cyclotron Laboratory) Mr MAXIMILIAN Hughes (National Superconducting Cyclotron Laboratory/Michigan State University) Prof. OSCAR NAVILIAT-CUNCIC (National Superconducting Cyclotron Laboratory/Michigan State University) Prof. PAUL VOYTAS (Wittenberg University) Prof. SEAN LIDDICK (National Superconducting Cyclotron Laboratory/Michigan State University) Dr SHUMPEI Noji (National Superconducting Cyclotron Laboratory) Dr STANLEY PAULAUSKAS (University of Tennessee)

Presentation materials