Tests of the standard electroweak model in nuclear beta decay

• DOI: 10.1103/revmodphys.78.991
• Publication Date: 2006-09-29T18:18:53Z
• Authors: Nathal Severijns; Marcus Beck; Oscar Naviliat-Cu...
• Keywords: Beta decay; Hamiltonian (control theory); BETA (programming language)

The current status of precision measurements in allowed nuclear beta decay is reviewed, including neutron decay, with emphasis on their potential to look for new physics beyond the standard electroweak model. Experimental results are interpreted framework phenomenological model-independent descriptions as well some specific extensions values couplings and constraints exotic general Hamiltonian updated. ratio between axial vector obtained ${C}_{A}∕{C}_{V}=\ensuremath{-}1.269\phantom{\rule{0.2em}{0ex}}92(69)$ under model assumptions. Particular attention devoted discussion sensitivity complementarity different experiments direct decay. prospects impact recent developments tools high intensity low-energy beams also addressed.