A comparative study of dark matter in the MSSM and its singlet extensions: a mini review

TL;DR

This review compares dark matter models in the MSSM and its singlet extensions, highlighting how recent detection experiments constrain parameter spaces and exploring the implications for light dark matter and Higgs phenomenology.

Contribution

It provides a comprehensive comparison of dark matter in MSSM, NMSSM, nMSSM, and singlet extensions, emphasizing experimental constraints and phenomenological differences.

Findings

Recent detection results exclude large parameter regions.

Singlet sector decouples in NMSSM but not in nMSSM.

NMSSM allows light dark matter consistent with experiments.

Abstract

In this note we briefly review the recent studies of dark matter in the MSSM and its singlet extensions: the NMSSM, the nMSSM, and the general singlet extension. Under the new detection results of CDMS II, XENON, CoGeNT and PAMELA, we find that (i) the latest detection results can exclude a large part of the parameter space which allowed by current collider constraints in these models. The future SuperCDMS and XENON can cover most of the allowed parameter space; (ii) the singlet sector will decouple from the MSSM-like sector in the NMSSM, however, singlet sector makes the nMSSM quite different from the MSSM; (iii) the NMSSM can allow light dark matter at several GeV exists. Light CP-even or CP-odd Higgs boson must be present so as to satisfy the measured dark matter relic density. In case of the presence of a light CP-even Higgs boson, the light neutralino dark matter can explain the CoGeNT and DAMA/LIBRA results; (iv) the general singlet extension of the MSSM gives a perfect explanation for both the relic density and the PAMELA result through the Sommerfeld-enhanced annihilation. Higgs decays in different scenario are also studied.