Speaker
Prof.
Andrey Ivanov
(Atominstitut TU Wien)
Description
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
the 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 the 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. The talk is based
on the results, obtained in Phys.Rev. D88, 073002 (2013) and Phys.Rev. D88, 065026(2013). It is supported by the
Austrian ``Fonds zur Förderung der Wissenschaftlichen Forschung''
(FWF) under contracts I689-N16, I862-N20 and P26781-N20 and by the
ÖAW within the New Frontiers Groups Programme, NFP 2013/09.
Summary
Our results should provide a necessary background for the measurement
of the contributions of order $10^{-4}$ to the $\beta^-$--decay of the
polarized neutron with polarized electron, caused by interactions
beyond the SM Phys.Rev. D88,073002 (2013) and Phys.Rev. D88, 065026(2013). Of course, the application of
our theoretical expressions to the experimental elaboration of the
experimental data with an aim to extract the contributions of order
10^(-4) of interactions beyond the SM should be meaningful only
after the improvement of the experimental uncertainties up to order
10^(-5), which is four orders of magnitude smaller compared to the
current experimental uncertainties Kozela et. al. Phys. Rev. C {\bf 85}, 045501 (2012).
Author
Prof.
Andrey Ivanov
(Atominstitut TU Wien)
