2006/05/23 by N. Severijns, M. Beck, O. Naviliat-Cuncic
Physics and Astronomy · #Atomic and Subatomic Physics Research #BETA (programming language) #Beta decay #Electroweak interaction #Hamiltonian (control theory) #Neutrino Physics Research #Neutron #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Sensitivity (control systems) #Standard Model (mathematical formulation) #nucl-ex
paper · pdf · doi:10.1103/revmodphys.78.991
published as Rev.Mod.Phys.78:991-1040,2006 · 52 pages, 33 figures; submitted to Review of Modern Physics; uses aps.sty and rmp.sty
arxiv created 2006/05/23 · openalex publication_date 2006/09/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 in the framework of phenomenological model-independent descriptions of nuclear beta decay as well as in some specific extensions of the standard model. The values of the standard couplings and the constraints on the exotic couplings of the general beta decay Hamiltonian are updated. The ratio between the axial and vector couplings obtained is CA∕CV=\ensuremath-1.269\phantom\rule0.2em0ex92(69) under standard model assumptions. Particular attention is devoted to the discussion of the sensitivity and complementarity of different precision experiments in direct beta decay. The prospects and impact of recent developments of precision tools and of high intensity low-energy beams are also addressed.