A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess
A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess
复制标题
具有标量暗物质和银河系中心伽马射线过剩的简化 2HDM
DOI:
10.1016/j.physletb.2014.11.016
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发表时间:
2014-06
影响因子:
4.4
通讯作者:
Xiao-Fang Han
中科院分区:
文献类型:
--
作者:
Lei Wang;Xiao-Fang Han
Due to the strong constraint from the LUX experiment, the scalar portal dark matter cannot generally explain a gamma-ray excess in the galactic center by the annihilation of dark matter to b b¯. With the motivation of eliminating the tension, we add a scalar dark matter to the aligned two-Higgs-doublet model, and focus on a simplified scenario, which has two main characteristics:(i) The heavy CP-even Higgs is the discovered 125 GeV Higgs boson, which has the same couplings to the gauge bosons and fermions as the SM Higgs.(ii) Only the light CP-even Higgs mediates the dark matter interactions with SM particles, which have no couplings to WW and ZZ, but have the independent couplings to the up-type quarks, down-type quarks and charged leptons. We find that the tension between< σ v> SS→ b b¯ and the constraint from LUX induced by the scalar portal dark matter can go away for the isospin-violating dark matter–nucleon coupling with− 1.0< f n/f p< 0.7, and the constraints from the Higgs search experiments and the relic density of Planck are also satisfied.
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影响因子:
4.4
作者:
M. Shifman;A. Vainshtein;V. Zakharov
通讯作者:
M. Shifman;A. Vainshtein;V. Zakharov
DOI:
10.1016/j.dark.2013.06.003
发表时间:
2013-02
期刊:
arXiv: High Energy Astrophysical Phenomena
影响因子:
--
作者:
D. Hooper;T. Slatyer
通讯作者:
D. Hooper;T. Slatyer
影响因子:
5.4
作者:
Aad, G.;Abajyan, T.;Zwalinski, L.
通讯作者:
Zwalinski, L.
影响因子:
5
作者:
Lei Wang;Xiao-Fang Han
通讯作者:
Lei Wang;Xiao-Fang Han
影响因子:
6.4
作者:
C. Weniger
通讯作者:
C. Weniger