1205.5081 (Wenyu Wang)

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

Wenyu Wang

In this note we briefly review the recent studies of dark matter in MSSM and its singlet extensions: NMSSM, 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 electro-weak scale in NMSSM, however, singlet sector make nMSSM quite different from MSSM; (iii) NMSSM can allow light dark matter at several GeV exist. 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 MSSM give a perfect explanation for both the relic density and the Pamela result through the Sommerfeld-enhanced annihilation. Higgs decay in different scenario are also studied.

View original: http://arxiv.org/abs/1205.5081