Dark Matter in a Constrained NMSSM

TL;DR

This paper investigates the parameter space of a constrained NMSSM model to identify regions compatible with observed dark matter relic density, highlighting differences from the MSSM such as Higgs resonance annihilation and singlino-dominant LSP scenarios.

Contribution

It provides a detailed analysis of the CNMSSM parameter space, incorporating collider constraints and higher-order corrections, to identify viable dark matter candidates and their annihilation mechanisms.

Findings

Identified regions with relic density matching WMAP data.

Highlighted the role of Higgs resonance at low tanβ.

Showed the significance of singlino component in LSP composition.

Abstract

We explore the parameter space of a Constrained Next-to-Minimal Supersymmetric Standard Model with GUT scale boundary conditions (CNMSSM) and find regions where the relic density of the lightest neutralino is compatible with the WMAP measurement. We emphasize differences with the MSSM: cases where annihilation of the LSP occurs via a Higgs resonance at low values of tan\beta and cases where the LSP has a large singlino component. The particle spectrum as well as theoretical and collider constraints are calculated with NMSSMTools. All neutralino annihilation and coannihilation processes are then computed with micrOMEGAs, taking into account higher order corrections to the Higgs sector.