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arXiv 1602.05192hep-ph
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违反暗扇区的CP的间接检测印记

Indirect Detection Imprint of a CP Violating Dark Sector

Wei Chao, Michael J. Ramsey-Musolf, Jiang-Hao Yu

摘要:

我们介绍了一个简单的方案,涉及费米子暗物质($χ$)和单重标量介质,可能占银河系中心的GeV $γ$射线过剩,同时满足目前的直接检测限制。标量势中的CP破坏导致标准模型希格斯玻色子和标量单线态之间的混合,导致三个标量$h_{1,2,3}$的不确定CP变换性质。这种混合使得s波$χ{\barχ}$湮灭为双标量态,随后衰变为四个费米子终态。观测到的$γ$射线谱可以在考虑到$m_χ = 60 \sim 80 $ GeV和$m_{h_3} \sim m_χ$的直接探测边界和Higgs玻色子性质的情况下进行拟合。在14 TeV LHC上对Higgs奇异衰变道$h_1 \to h_3 h_3$的探测应该能够进一步探测$γ$ -射线过剩所青睐的参数区域。

英文摘要:

We introduce a simple scenario involving fermionic dark matter ($χ$) and singlet scalar mediators that may account for the Galactic Center GeV $γ$-ray excess while satisfying present direct detection constraints. CP-violation in the scalar potential leads to mixing between the Standard Model Higgs boson and the scalar singlet, resulting in three scalars $h_{1,2,3}$ of indefinite CP-transformation properties. This mixing enables s-wave $χ{\barχ}$ annihilation into di-scalar states, followed by decays into four fermion final states. The observed $γ$-ray spectrum can be fitted while respecting present direct detection bounds and Higgs boson properties for $m_χ = 60 \sim 80 $ GeV, and $m_{h_3} \sim m_χ$. Searches for the Higgs exotic decay channel $h_1 \to h_3 h_3$ at the 14 TeV LHC should be able to further probe the parameter region favored by the $γ$-ray excess.

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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