Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-08-26
Phys.Rev.D82:095004,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 8 figures. minor changes and a reference added, published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.82.095004
We investigate singlet scalar dark matter (DM) candidate in a left-right symmetric gauge model with two Higgs bidoublets (2HBDM) in which the stabilization of the DM particle is induced by the discrete symmetries P and CP. According to the observed DM abundance, we predict the DM direct and indirect detection cross sections for the DM mass range from 10 GeV to 500 GeV. We show that the DM indirect detection cross section is not sensitive to the light Higgs mixing and Yukawa couplings except the resonance regions. The predicted spin-independent DM-nucleon elastic scattering cross section is found to be significantly dependent on the above two factors. Our results show that the future DM direct search experiments can cover the most parts of the allowed parameter space. The PAMELA antiproton data can only exclude two very narrow regions in the 2HBDM. It is very difficult to detect the DM direct or indirect signals in the resonance regions due to the Breit-Wigner resonance effect.
Guo Wan-lei
Wu Yue-Liang
Zhou Yu-Feng
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