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arXiv 1406.3598hep-phastro-ph.HE
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具有标量暗物质和银河系中心gamma-ray过剩的简化2 HDM

A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess

Lei Wang, Xiao-Fang Han

摘要:

由于受到LUX实验的强烈限制,标量门暗物质理论不能解释星系中心由暗物质湮灭为$b\bar{b}$而产生的γ射线过剩。为了消除这种张力,我们在排列的两个Higgs-偶态模型中加入了一个标量暗物质,并着重讨论了一个简化的情形,它有两个主要特征:(i)重CP偶态Higgs是已发现的125 GeV的希格斯玻色子玻色子,它与规范玻色子和费米子的耦合与SM Higgs玻色子相同。(ii)只有轻CP偶Higgs介导了暗物质与SM粒子的相互作用,它与$WW$和$ZZ$没有耦合,而与上夸克、下夸克和带电轻子有独立的耦合.我们发现,当$-1.0< f^n/f^p<0.7$与同位旋破坏的暗物质-核子耦合时,由标量门暗物质引起的LUX约束与$<σv>_{SS\to b\bar{b}}$之间的张力可以消除,并且满足Higgs搜索实验和Planck残余密度的约束.

英文摘要:

Due to the strong constrain from the LUX experiment, the scalar portal dark matter can not generally explain a gamma-ray excess in the galactic center by the annihilation of dark matter into $b\bar{b}$. 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 has no couplings to $WW$ and $ZZ$, but the independent couplings to the up-type quarks, down-type quarks and charged leptons. We find that the tension between $<σv>_{SS\to b\bar{b}}$ 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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