Leptophilic dark matter in gauged U(1)Le−Lμ model in light of DAMPE cosmic ray e++e− excess
Leptophilic dark matter in gauged U(1)Le−Lμ model in light of DAMPE cosmic ray e++e− excess
复制标题
根据 DAMPE 宇宙射线 e e — 过量测量的 U(1 ) Le — L × U(1)Le — LÎ 模型中的亲亲暗物质
DOI：
10.1140/epjc/s10052-018-5805-1
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
J. M. Yang
中科院分区：
文献类型：
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作者：
G. H. Duan;X. G. He;L. Wu;J. M. Yang
受DAMPE合作组最近观测到的宇宙线电子+正电子过剩的启发，我们在规范模型中研究了Dirac费米子暗物质。DM通过规范玻色子与电子和μ子相互作用。该模型能很好地解释DAMPE数据。虽然只在一个圈能级上产生非零的DM-核子截面，并且在与耦合之间存在部分抵消，但我们发现，很大一部分质量被排除在直接DM检测限之外，使允许质量接近DM质量的两倍。本文还研究了和μ子反常的意义。
Motivated by the very recent cosmic-ray electron+ positron excess observed by DAMPE collaboration, we investigate a Dirac fermion dark matter (DM) in the gaugedmodel. DM interacts with the electron and muon via thegauge boson. The model can explain the DAMPE data well. Although a non-zero DM-nucleon cross section is only generated at one loop level and there is a partial cancellation betweenandcouplings, we find that a large portion ofmass is ruled out from direct DM detection limit leaving the allowedmass to be close to two times of the DM mass. Implications forand, and muonanomaly are also studied.