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arXiv 1602.01801hep-phhep-ex
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利用LHC双光子过剩实现暗物质和Higgs暴胀

Realizing Dark Matter and Higgs Inflation in Light of LHC Diphoton Excess

Shao-Feng Ge, Hong-Jian He, Jing Ren, Zhong-Zhi Xianyu

摘要:

LHC Run-2提供了750 GeV附近新共振的有趣双光子信号,如果不是由于统计涨落,那么在TeV尺度上必须要求新的物理超越标准模型(SM)。我们提出了一个最小的扩展SM与一个复杂的单标量$\mathcal{S}$和一个双重的矢量夸克。标量扇区尊重CP对称性,其CP奇虚分量$χ$提供了自然的暗物质(DM)候选者。$\mathcal{S}$的实部作为新的共振(750 GeV),并解释了LHC Run-2的双光子过剩。$\mathcal{S}$新的标量自由度有助于稳定Higgs真空,并能实现GUT尺度附近的Higgs暴胀,与目前的宇宙学观测结果一致。我们构造了我们模型的两个代表性样本A和B用于演示。我们研究了在LHC运行-2中不可见衰变Re $(\mathcal{S}) \to χχ$产生DM的单喷流信号。我们进一步推导了DM遗迹密度的界,并分析了直接和间接DM检测的约束条件。

英文摘要:

LHC Run-2 has provided intriguing di-photon signals of a new resonance around 750GeV, which, if not due to statistical fluctuations, must call for new physics beyond the standard model (SM) at TeV scale. We propose a minimal extension of the SM with a complex singlet scalar $\mathcal{S}$ and a doublet of vector-like quarks. The scalar sector respects CP symmetry, with its CP-odd imaginary component $χ$ providing a natural dark matter (DM) candidate. The real component of $\mathcal{S}$ serves as the new resonance (750GeV) and explains the diphoton excess of the LHC Run-2. The new scalar degrees of freedom of $\mathcal{S}$ help to stabilize the Higgs vacuum, and can realize the Higgs inflation around GUT scale, consistent with the current cosmology observations. We construct two representative samples A and B of our model for demonstration. We study the mono-jet signals of the DM production from invisible decays Re$(\mathcal{S}) \to χχ$ at the LHC Run-2. We further derive the DM relic density bound, and analyze the constraints from direct and indirect DM detections.

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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