Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-08-04
JHEP 0911:053,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Version in JHEP
Scientific paper
10.1088/1126-6708/2009/11/053
As discussed recently by Hooper and Tait, the singlino-like dark matter in the Minimal Supersymmetric Standard Model (MSSM) extended by a singlet Higgs superfield can give a perfect explanation for both the relic density and the Pamela result through the Sommerfeld-enhanced annihilation into singlet Higgs bosons ($a$ or $h$ followed by $h->a a$) with $a$ being light enough to decay dominantly to muons or electrons. In this work we analyze the parameter space required by such a dark matter explanation and also consider the constraints from the LEP experiments. We find that although the light singlet Higgs bosons have small mixings with the Higgs doublets in the allowed parameter space, their couplings with the SM-like Higgs boson $h_{SM}$ (the lightest doublet-dominant Higgs boson) can be enhanced by the soft parameter $A_\kappa$ and, in order to meet the stringent LEP constraints, the $h_{SM}$ tends to decay into the singlet Higgs pairs $aa$ or $hh$ instead of $b\bar b$. So the $h_{SM}$ produced at the LHC will give a multi-muon signal, h_{SM} -> aa -> 4 muons or h_{SM} -> hh -> 4 a -> 8 muons.
Wang Wenyu
Xiong Zhaohua
Yang Jin Min
Yu Li-Xin
No associations
LandOfFree
Dark Matter in the Singlet Extension of MSSM: Explanation of Pamela and Implication on Higgs Phenomenology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dark Matter in the Singlet Extension of MSSM: Explanation of Pamela and Implication on Higgs Phenomenology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dark Matter in the Singlet Extension of MSSM: Explanation of Pamela and Implication on Higgs Phenomenology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-557377