R-parity violating supersymmetric contributions to the neutron beta decay

TL;DR

This paper explores how R-parity violating supersymmetry could influence neutron beta decay, deriving new limits on RPV couplings and identifying novel angular correlations sensitive to these interactions.

Contribution

It introduces a method to connect RPV effects to neutron decay observables and establishes updated constraints on RPV couplings based on recent experimental data.

Findings

New upper limits on RPV couplings derived from neutron decay data

Identification of novel angular correlations sensitive to RPV interactions

Enhanced understanding of scalar interactions in 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 effective scalar interaction of the neutron beta decay is constructed by making use of the relation between isospin asymmetries and the proton-neutron 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. We also point out the existence of new types of angular correlations which are sensitive to the RPV interactions.