A method for an improved measurement of the electron–antineutrino correlation in free neutron beta decay

Autor:	M. B. Leuschner, Jeffrey S. Nico, Yuri Mostovoy, Fred B. Bateman, S. Balashov, B Collet, Gordon L. Jones, B. G. Yerozolimsky, C. Trull, Richard Wilson, Maynard S. Dewey, J. Byrne, L. Goldin, B. M. Fisher, Fred E. Wietfeldt, Alan K. Thompson, A. Komives
Rok vydání:	2005
Předmět:	Physics Nuclear and High Energy Physics Proton Nuclear Theory Electron Beta decay Beta-decay stable isobars Nuclear physics High Energy Physics::Experiment Neutron Nuclear Experiment Instrumentation Pseudovector Electron neutrino Dimensionless quantity
Zdroj:	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 545:181-193
ISSN:	0168-9002
Popis:	The angular correlation between the beta electron and antineutrino in nuclear beta decay is characterized by the dimensionless parameter a. The value of a for free neutron decay, when combined with other neutron decay parameters, can be used to determine the weak vector and axial vector coupling constants gV and gA and test the validity and selfconsistency of the Electroweak Standard Model. Previous experiments that measured a in neutron decay relied on precise proton spectroscopy and were limited by systematic effects at about the 5% level. We present a new approach to measuring a for which systematic uncertainties promise to be much smaller. r 2005 Elsevier B.V. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4f9a3884d3e322143b99ad7993af6c45 https://doi.org/10.1016/j.nima.2005.01.339 Zobrazit plný text záznamu Full Text from ScienceDirect