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Light dark matter in NMSSM and implication on Higgs phenomenology | | Junjie Cao
; Ken-ichi Hikasa
; Wenyu Wang
; Jin Min Yang
; | | Date: |
10 Apr 2011 | | Abstract: | Motivated by the recent CoGeNT and DAMA/LIBRA data, we perform an intensive
search for a light neutralino dark matter in the framework of the
next-to-minimal supersymmetric model (NMSSM). We consider current experimental
constraints and scan over the parameter space, assuming all the relevant soft
mass parameters to be below TeV scale. We find that in the allowed parameter
space the neutralino dark matter can be as light as a few GeV and,
concurrently, a 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 scatter off the
nucleon with a spin-independent cross section at the level of 10^{-39} cm^2,
which thus can explain the CoGeNT and DAMA/LIBRA results. Further, we find that
in such a scenario the SM-like Higgs boson (h_SM) will decay predominantly into
a pair of light Higgs bosons or a pair of neutralinos and the conventional
decay modes will be greatly suppressed. As a result, its di-photon signal (the
most important discovering channel) at the LHC will be much suppressed. | | Source: | arXiv, 1104.1754 | | Services: | Forum | Review | PDF | Favorites | |
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