Leptophilic dark matter in gauged U(1) Le - Lμ model in light of DAMPE cosmic ray e+ + e- excess

被引：0
作者：
Duan, Guang Hua [1 ,2 ,3 ,4 ]
He, Xiao-Gang [5 ,6 ,7 ]
Wu, Lei [1 ,2 ]
Yang, Jin Min [3 ,4 ,8 ]
机构：
[1] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Jiangsu, Peoples R China
[2] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Jiangsu, Peoples R China
[3] Acad Sinica, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
[4] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
[5] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
[6] Natl Ctr Theoret Sci, Phys Div, Hsinchu 30013, Taiwan
[7] Shanghai Jiao Tong Univ, Sch Phys & Astron, T D Lee Inst, Shanghai 200240, Peoples R China
[8] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
来源：
EUROPEAN PHYSICAL JOURNAL C | 2018年 / 78卷 / 04期
基金：
中国国家自然科学基金;
关键词：
BOSON; LEP;
D O I：
10.1140/epjc/s10052-018-5805-1
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Motivated by the very recent cosmic-ray electron+positron excess observed by DAMPE collaboration, we investigate a Dirac fermion dark matter (DM) in the gauged L-e - L-mu model. DM interacts with the electron and muon via the U(1)(e-mu) gauge boson Z'. 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 between Z' ee and Z' mu mu couplings, we find that a large portion of Z' mass is ruled out from direct DM detection limit leaving the allowed Z' mass to be close to two times of the DM mass. Implications for pp -> Z' -> 2l and pp -> 2l + Z', and muon g - 2 anomaly are also studied.
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页数：5
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