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A 750 GeV门户网站:LHC现象学和暗物质候选

A 750 GeV Portal: LHC Phenomenology and Dark Matter Candidates

Francesco D'Eramo, Jordy de Vries, Paolo Panci

摘要:

我们研究了通过扩展标准模型场的内容而得到的有效场论,其中包括两个单态:一个750 GeV的赝标量和一个稳定的费米子。会计对撞机生产胶子和光子融合发起,我们调查的理论是一致的LHC双光子过剩和边界运行1。我们分析了这些地区的暗物质现象,包括遗迹密度的限制,以及碰撞,直接和间接的界限。标量门户暗物质模型是非常接近的限制,从直接检测和单喷流的搜索,如果胶子融合占主导地位,而不是在所有其他限制。赝标量模型的挑战光子线限制和单喷流搜索在大多数的参数空间。

英文摘要:

We study the effective field theory obtained by extending the Standard Model field content with two singlets: a 750 GeV (pseudo-)scalar and a stable fermion. Accounting for collider productions initiated by both gluon and photon fusion, we investigate where the theory is consistent with both the LHC diphoton excess and bounds from Run 1. We analyze dark matter phenomenology in such regions, including relic density constraints as well as collider, direct, and indirect bounds. Scalar portal dark matter models are very close to limits from direct detection and mono-jet searches if gluon fusion dominates, and not constrained at all otherwise. Pseudo-scalar models are challenged by photon line limits and mono-jet searches in most of the parameter space.

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