# Resonant slepton production and right sneutrino dark matter in left-right supersymmetry

## TL;DR

This paper explores the potential of right-handed sneutrinos as dark matter candidates within left-right supersymmetric models, analyzing their production, detection prospects at the LHC, and comparing them with neutralino scenarios.

## Contribution

It introduces a detailed study of right-handed sneutrino dark matter in left-right supersymmetry, including collider signals and benchmark scenarios, highlighting their detectability at the LHC.

## Key findings

- Resonant right-handed slepton production enhances detection prospects.
- Right-handed sneutrinos can satisfy relic density and experimental constraints.
- LHC signals with leptons and missing energy can reveal sneutrino dark matter.

## Abstract

Right-handed sneutrinos are natural components of left-right symmetric supersymmetric models where the gauge sector is extended to include right-handed weak interactions. Unlike in other models where right-handed sneutrinos are gauge singlets, here the right sneutrino is part of a doublet and could be a dark matter candidate whose annihilation proceeds via gauge interactions. We investigate this possibility, and find that relic density, low-energy observable and direct supersymmetry search constraints can be satisfied when the lightest supersymmetric particle is a right-handed sneutrino. We introduce benchmarks for left-right supersymmetric realizations where either a sneutrino or a neutralino is the lightest superpartner. We then study the LHC signals arising through resonant right-handed slepton production via a $W_R$ gauge-boson exchange that lead to final states enriched in leptons, additionally containing a large amount of missing transverse momentum, and featuring a low jet multiplicity. We find that such a resonant production would boost the chances of discovering these weakly interacting supersymmetric particles for a mass range extending beyond 1 TeV already with a luminosity of 100 fb$^{-1}$. Finally, we compare sneutrino versus neutralino scenarios, and comment on differences with other sneutrino dark matter models.