Dark matter candidates in the NMSSM with RH neutrino superfields

TL;DR

This paper explores dark matter candidates within the NMSSM extended with right-handed neutrino superfields, analyzing their relic density and detection prospects through parameter scans and considering various annihilation mechanisms.

Contribution

It introduces a detailed analysis of RH sneutrino and neutralino dark matter candidates in the NMSSM with dynamically generated Majorana masses, including their relic density and detection implications.

Findings

RH sneutrino and neutralino can both account for dark matter relic density.

Annihilation mechanisms include resonances, scalar quartic couplings, and coannihilations.

Current and future detection experiments impact the viability of these candidates.

Abstract

R-parity conserving supersymmetric models with right-handed (RH) neutrinos are very appealing since they could naturally explain neutrino physics and also provide a good dark matter (DM) candidate such as the lightest supersymmetric particle (LSP). In this work we consider the next-to-minimal supersymmetric standard model (NMSSM) plus RH neutrino superfields, with effective Majorana masses dynamically generated at the electroweak scale (EW). We perform a scan of the relevant parameter space and study both possible DM candidates: RH sneutrino and neutralino. Especially for the case of RH sneutrino DM we analyse the intimate relation between both candidates to obtain the correct amount of relic density. Besides the well-known resonances, annihilations through scalar quartic couplings and coannihilation mechanisms with all kind of neutralinos, are crucial. Finally, we present the impact of current and future direct and indirect detection experiments on both DM candidates.