https://doi.org/10.1140/epjc/s10052-018-5678-3
Regular Article - Theoretical Physics
Explaining the DAMPE data with scalar dark matter and gauged 
interaction
1
College of Physics and Materials Science, Henan Normal University, Xinxiang, 453007, China
2
Center for High Energy Physics, Peking University, Beijing, 100871, China
3
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, China
4
School of Physics, Zhengzhou University, Zhengzhou, 450000, China
5
School of Physics, KIAS, 85 Hoegiro, Seoul, 02455, Republic of Korea
6
School of Astronomy and Space Science, University of Science and Technology of China, Hefei, 230026, Anhui, China
* e-mail: feiwang@zzu.edu.cn
** e-mail: pwwu@kias.re.kr
Received:
10
January
2018
Accepted:
26
February
2018
Published online:
9
March
2018
Inspired by the peak structure observed by recent DAMPE experiment in 
cosmic-ray spectrum, we consider a scalar dark matter (DM) model with gauged symmetry, which is the most economical anomaly-free theory to potentially explain the peak by DM annihilation in nearby subhalo. We utilize the process 
, where 
, 
, 
denote the scalar DM, the new gauge boson and 
, respectively, to generate the spectrum. By fitting the predicted spectrum to the experimental data, we obtain the favored DM mass range 
and 
at 
Confidence Level (C.L.). Furthermore, we determine the parameter space of the model which can explain the peak and meanwhile satisfy the constraints from DM relic abundance, DM direct detection and the collider bounds. We conclude that the model we consider can account for the peak, although there exists a tension with the constraints from the LEP-II bound on 
arising from the cross section measurement of 
.
© The Author(s), 2018
