arXiv:0706.3788·v2·High Energy Physics — Phenomenology
Measurement of the Neutrino Asymmetry Parameter B in Neutron Decay
M. Schumann🇩🇪 · T. Soldner🇫🇷 · M. Deissenroth🇩🇪 · F. Glueck🇩🇪 · J. Krempel🇩🇪 · M. Kreuz🇩🇪 · B. Maerkisch🇩🇪 · D. Mund🇩🇪 · A. Petoukhov🇩🇪 · H. Abele🇩🇪
Abstract
A new measurement of the neutrino asymmetry parameter B in neutron decay, the angular correlation between neutron spin and anti-neutrino momentum, is presented. The result, B=0.9802(50), agrees with the Standard Model expectation and earlier measurements, and permits improved tests on ``new physics'' in neutron decay.
Comments: 4 pages, 2 figures; v2: revised PRL version