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arXiv 1409.7864hep-ph
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银河系中心gamma ray过剩的NMSSM解释和有希望的LHC搜索

NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches

Jun Guo, Jinmian Li, Tianjun Li, Anthony G. Williams

摘要:

在具有$Z_3$离散对称性的次极小超对称标准模型(NMSSM)框架下解释了银河系中心过剩(GCE)。我们发现,一个共振CP奇希格斯玻色子的质量的两倍,暗物质(DM)的候选人是有利的。同时,为了得到正确的DM残余密度,要求DM候选体通过其Higgsino分量与$Z$玻色子有较大的耦合。详细讨论了它通过四个特征发现LHC的潜力。我们发现,最敏感的信号是由希格斯诺类电荷伴子和中性伴子对的产生及其随后衰变成$W$玻色子,$Z$玻色子和DM。大部分的相关参数空间可以在大型强子对撞机上探测,质心能量为14 TeV,积分亮度为1000 fb $^{-1}$。

英文摘要:

The Galactic Center Excess (GCE) is explained in the framework of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) with a $Z_3$ discrete symmetry. We show that a resonant CP-odd Higgs boson with mass twice that of the Dark Matter (DM) candidate is favoured. Meanwhile, the DM candidate is required to have relatively large coupling with the $Z$ boson through its Higgsino component in order to obtain correct DM relic density. Its LHC discovery potential via four signatures is discussed in detail. We find that the most sensitive signals are provided by the Higgsino-like chargino and neutralino pair production with their subsequent decays into $W$ bosons, $Z$ bosons, and DM. The majority of the relevant parameter space can be probed at the Large Hadron Collider with a centre-of-mass energy of 14 TeV and an integrated luminosity 1000 fb$^{-1}$.

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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