Search for gamma-ray spectral lines with the DArk Matter Particle Explorer
Creators: name: Alemanno, Francesca
name: An, Qi
name: Azzarello, Philipp
name: Barbato, Felicia Carla Tiziana
name: Bernardini, Paolo
name: Bi, Xiao-Jun
name: Cai, Ming-Sheng
name: Casilli, Elisabetta
name: Catanzani, Enrico
name: Chang, Jin
name: Chen, Deng-Yi
name: Chen, Jun-Ling
name: Chen, Zhan-Fang
name: Cui, Ming-Yang
name: Cui, Tian-Shu
name: Cui, Yu-Xing
name: Dai, Hao-Ting
name: De Benedittis, Antonio
name: De Mitri, Ivan
name: de Palma, Francesco
name: Deliyergiyev, Maksym
name: Di Santo, Margherita
name: Ding, Qi
name: Dong, Tie-Kuang
name: Dong, Zhen-Xing
name: Donvito, Giacinto
name: Droz, David
name: Duan, Jing-Lai
name: Duan, Kai-Kai
name: D'Urso, Domenico
name: Fan, Rui-Rui
name: Fan, Yi-Zhong
name: Fang, Fang
name: Fang, Kun
name: Feng, Chang-Qing
name: Feng, Lei
name: Fusco, Piergiorgio
name: Gao, Min
name: Gargano, Fabio
name: Gong, Ke
name: Gong, Yi-Zhong
name: Guo, Dong-Ya
name: Guo, Jian-Hua
name: Han, Shuang-Xue
name: Hu, Yi-Ming
name: Huang, Guang-Shun
name: Huang, Xiao-Yuan
name: Huang, Yong-Yi
name: Ionica, Maria
name: Jiang, Wei
name: Kong, Jie
name: Kotenko, Andrii
name: Kyratzis, Dimitrios
name: Lei, Shi-Jun
name: Li, Shang
name: Li, Wen-Hao
name: Li, Wei-Liang
name: Li, Xiang
name: Li, Xian-Qiang
name: Liang, Yao-Ming
name: Liu, Cheng-Ming
name: Liu, Hao
name: Liu, Jie
name: Liu, Shu-Bin
name: Liu, Yang
name: Loparco, Francesco
name: Luo, Chuan-Ning
name: Ma, Miao
name: Ma, Peng-Xiong
name: Ma, Tao
name: Ma, Xiao-Yong
name: Marsella, Giovanni
name: Mazziotta, Mario Nicola
name: Mo, Dan
name: Mu, Maria
name: Niu, Xiao-Yang
name: Pan, Xu
name: Parenti, Andrea
name: Peng, Wen-Xi
name: Peng, Xiao-Yan
name: Perrina, Chiara
name: Qiao, Rui
name: Rao, Jia-Ning
name: Ruina, Arshia
name: Shangguan, Zhi
name: Shen, Wei-Hua
name: Shen, Zhao-Qiang
name: Shen, Zhong-Tao
name: Silveri, Leandro
name: Song, Jing-Xing
name: Stolpovskiy, Mikhail
name: Su, Hong
name: Su, Meng
name: Sun, Hao-Ran
name: Sun, Zhi-Yu
name: Surdo, Antonio
name: Teng, Xue-Jian
name: Tykhonov, Andrii
name: Wang, Jin-Zhou
name: Wang, Lian-Guo
name: Wang, Shen
name: Wang, Shu-Xin
name: Wang, Xiao-Lian
name: Wang, Ying
name: Wang, Yan-Fang
name: Wang, Yuan-Zhu
name: Wei, Da-Ming
name: Wei, Jia-Ju
name: Wei, Yi-Feng
name: Wu, Di
name: Wu, Jian
name: Wu, Li-Bo
name: Wu, Sha-Sha
name: Wu, Xin
name: Xia, Zi-Qing
name: Xu, En-Heng
name: Xu, Hai-Tao
name: Xu, Zhi-Hui
name: Xu, Zun-Lei
name: Xu, Zi-Zong
name: Xue, Guo-Feng
name: Yang, Hai-Bo
name: Yang, Peng
name: Yang, Ya-Qing
name: Yao, Hui-Jun
name: Yu, Yu-Hong
name: Yuan, Guan-Wen
name: Yuan, Qiang
name: Yue, Chuan
name: Zang, Jing-Jing
name: Zhang, Sheng-Xia
name: Zhang, Wen-Zhang
name: Zhang, Yan
name: Zhang, Yi
name: Zhang, Yong-Jie
name: Zhang, Yun-Long
name: Zhang, Ya-Peng
name: Zhang, Yong-Qiang
name: Zhang, Zhe
name: Zhang, Zhi-Yong
name: Zhao, Cong
name: Zhao, Hong-Yun
name: Zhao, Xun-Feng
name: Zhou, Chang-Yi
name: Zhu, Yan
name: Liang, Yun-Feng
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The DArk Matter Particle Explorer (DAMPE) is well suitable for searching for monochromatic and sharp $γ$-ray structures in the GeV$-$TeV range thanks to its unprecedented high energy resolution. In this work, we search for $γ$-ray line structures using five years of DAMPE data. To improve the sensitivity, we develop two types of dedicated data sets (including the BgoOnly data which is the first time to be used in the data analysis for the calorimeter-based gamma-ray observatories) and adopt the signal-to-noise ratio optimized regions of interest (ROIs) for different DM density profiles. No line signals or candidates are found between 10 and 300 GeV in the Galaxy. The constraints on the velocity-averaged cross section for $χχ\to γγ$ and the decay lifetime for $χ\to γν$, both at 95% confidence level, have been calculated and the systematic uncertainties have been taken into account. Comparing to the previous Fermi-LAT results, though DAMPE has an acceptance smaller by a factor of $\sim 10$, similar constraints on the DM parameters are achieved and below 100 GeV the lower limits on the decay lifetime are even stronger by a factor of a few. Our results demonstrate the potential of high-energy-resolution observations on dark matter detection.
description: 14 pages, 8 figures. Update the content to keep up with the published version