Speaker
John Behr
(TRIUMF)
Description
We have measured the beta asymmetry with respect to the nuclear spin in 37K decay to be -0.5706+-0.0018. Ours is the most accurate beta asymmetry measurement in any nucleus or the neutron, and is in agreement with the Standard Model of particle physics. I will show our constraints on beyond-Standard Model physics complementary to other beta decay measurements. I will also describe our planned improvements to TRIUMF's laser-cooled atom trap for beta decay (TRINAT), including measurement of the asymmetry of the low-energy nuclear recoils. We hope to reach accuracy sufficient to complement pion decay and high-energy experiments, probing coupling strengths of possible new bosons to first-generation particles.
Authors
John Behr
(TRIUMF)
Ben Fenker
(Texas A&M)
Dan Melconian
(Texas A&M)
Alexandre Gorelov
(TRIUMF)
Melissa Anholm
(U. Manitoba)
Danny Ashery
(Tel Aviv U.)
Gerald Gwinner
(U. Manitoba)
James McNeil
(U. British Columbia)
