R-parity violating supersymmetric contributions to the neutron beta decay

Abstract

We investigate the contribution to the angular correlation coefficients of the neutron beta decay within the R-parity violating (RPV) minimal supersymmetric standard model (MSSM). The RPV effects contribute to the scalar interaction at the tree level. The coefficient of the effective scalar interaction of the nucleon is determined in terms of the nucleon mass difference. On the basis of the recent update of the analyses of the superallowed Fermi transitions and the recent measurement of transverse polarization of the emitted electrons at PSI, we deduce new upper limits on the RPV couplings and compare them with those obtained through the pion decay and atomic electric dipole moment (EDM). We also give a comprehensive analysis of angular correlations sensitive to the RPV interactions.