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arXiv 1601.06355hep-ph
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辐射中微子质量与$Z_3$暗物质:从遗迹密度到LHC特征

Radiative Neutrino Mass with $Z_3$ Dark matter: From Relic Density to LHC Signatures

Ran Ding, Zhi-Long Han, Yi Liao, Wan-Peng Xie

摘要:

在这项工作中,我们给出了一个具体的$\mathbb{Z}_3$暗物质(DM)模型中,中微子质量诱导在两个循环的DM粒子,可以是一个复杂的标量或狄拉克费米子的相互作用的现象进行了全面的分析。详细讨论了DM在遗迹密度和直接探测方面的特性以及LHC的特征,并简要讨论了对银河系中心γ射线过剩的间接探测。在DM方面,半湮没和共湮没过程在缓解遗迹密度和直接检测之间的参数空间的紧张关系方面起着至关重要的作用。在对撞机一侧,由$\mathbb{Z}_3$粒子产生的新衰变通道在LHC上产生了不同的信号。目前,三轻子信号被认为是标量和费米子DM候选者最严格的边界,费米子DM的签名与简化超对称模型中的电弱子非常相似。

英文摘要:

In this work we give a comprehensive analysis on the phenomenology of a specific $\mathbb{Z}_3$ dark matter (DM) model in which neutrino mass is induced at two loops by interactions with a DM particle that can be a complex scalar or a Dirac fermion. Both the DM properties in relic density and direct detection and the LHC signatures are examined in great detail, and indirect detection for gamma-ray excess from the Galactic Center is also discussed briefly. On the DM side, both semi-annihilation and co-annihilation processes play a crucial role in alleviating the tension of parameter space between relic density and direct detection. On the collider side, new decay channels resulting from $\mathbb{Z}_3$ particles lead to distinct signals at LHC. Currently the trilepton signal is expected to give the most stringent bound for both scalar and fermion DM candidates, and the signatures of fermion DM are very similar to those of electroweakinos in simplified supersymmetric models.

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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