We give a precision analysis of the correlation coefficients of the electron-energy spectrum and angular distribution of the beta decay and radiative beta decay of the neutron with polarized neutron and electron to order 10^(-3). The calculation of correlation coefficients is carried out within the Standard model with contributions of order 10^(-3), caused by the weak magnetism and proton recoil, taken to next-to-leading order in the large proton mass expansion, and with radiative corrections of order “alpha/pi ~ 10^(-3”, calculated to leading order in the large proton mass expansion. The obtained results can be used for the planning of experiments on the search for contributions of order 10^(-4) of interactions beyond the Standard model.
A. Ivanov, R. Hollwieser, N. Troitskaya, et. al.
Tue, 23 May 17
Comments: 11 pages, 2 figures, The results, obtained in this paper, were reported at the “Satellite workshop on symmetries in light and heavy flavour”, which was held on 7 – 8 November 2016 at Max Planck Institute for Astrophysics (MPA), M\”unchen, Germany