Right-handed Sneutrino Dark Matter in Supersymmetric B-L Model

TL;DR

This paper demonstrates that the lightest right-handed sneutrino in a supersymmetric B-L model with inverse seesaw is a viable dark matter candidate, matching relic abundance and experimental detection constraints.

Contribution

It introduces the right-handed sneutrino as a dark matter candidate within the supersymmetric B-L model and analyzes its relic abundance and detection prospects.

Findings

Sneutrino accounts for observed dark matter relic density.

Spin-independent cross section aligns with CDMS II and XENON results.

Cannot explain PAMELA positron excess without a boost factor.

Abstract

We show that the lightest right-handed sneutrino in TeV scale supersymmetric B-L model with inverse seesaw mechanism is a viable candidate for cold dark matter. We find that it accounts for the observed dark matter relic abundance in a wide range of parameter space. The spin-independent cross section of B-L right-handed sneutrino is consistent with the recent results CDMS II and XENON experiments and it is detectable in future direct detection experiments. Although the B-L right-handed sneutrinos annihilate into leptons, the PAMELA results can not be explained in this model unless a huge boost factor is considered. Also the muon flux generated by B-L right-handed sneutrino in the galactic center is smaller than Super-Kamiokande's upper bound.