https://doi.org/10.1140/epjc/s10052-018-5805-1
Regular Article - Theoretical Physics
Leptophilic dark matter in gauged 
model in light of DAMPE cosmic ray 
excess
1
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, 210023, Jiangsu, China
2
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Academia Sinica, Beijing, 100190, China
3
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
4
Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
5
Physics Division, National Center for Theoretical Sciences, Hsinchu, 30013, Taiwan
6
T-D Lee Institute, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
7
Department of Physics, Tohoku University, Sendai, 980-8578, Japan
* e-mail: leiwu@itp.ac.cn
Received:
15
December
2017
Accepted:
12
April
2018
Published online:
21
April
2018
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 
model. DM interacts with the electron and muon via the 
gauge 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 between 
and 
couplings, we find that a large portion of 
mass is ruled out from direct DM detection limit leaving the allowed 
mass to be close to two times of the DM mass. Implications for 
and 
, and muon 
anomaly are also studied.
© The Author(s), 2018
