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26 April 2024

» arxiv » 2112.08860

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Search for gamma-ray spectral lines with the DArk Matter Particle Explorer
Francesca Alemanno ; Qi An ; Philipp Azzarello ; Felicia Carla Tiziana Barbato ; Paolo Bernardini ; Xiao-Jun Bi ; Ming-Sheng Cai ; Elisabetta Casilli ; Enrico Catanzani ; Jin Chang ; Deng-Yi Chen ; Jun-Ling Chen ; Zhan-Fang Chen ; Ming-Yang Cui ; Tian-Shu Cui ; Yu-Xing Cui ; Hao-Ting Dai ; Antonio De Benedittis ; Ivan De Mitri ; Francesco de Palma ; Maksym Deliyergiyev ; Margherita Di Santo ; Qi Ding ; Tie-Kuang Dong ; Zhen-Xing Dong ; Giacinto Donvito ; David Droz ; Jing-Lai Duan ; Kai-Kai Duan ; Domenico D'Urso ; Rui-Rui Fan ; Yi-Zhong Fan ; Fang Fang ; Kun Fang ; Chang-Qing Feng ; Lei Feng ; Piergiorgio Fusco ; Min Gao ; Fabio Gargano ; Ke Gong ; Yi-Zhong Gong ; Dong-Ya Guo ; Jian-Hua Guo ; Shuang-Xue Han ; Yi-Ming Hu ; Guang-Shun Huang ; Xiao-Yuan Huang ; Yong-Yi Huang ; Maria Ionica ; Wei Jiang ; Jie Kong ; Andrii Kotenko ; Dimitrios Kyratzis ; Shi-Jun Lei ; Shang Li ; Wen-Hao Li ; Wei-Liang Li ; Xiang Li ; Xian-Qiang Li ; Yao-Ming Liang ; Cheng-Ming Liu ; Hao Liu ; Jie Liu ; Shu-Bin Liu ; Yang Liu ; Francesco Loparco ; Chuan-Ning Luo ; Miao Ma ; Peng-Xiong Ma ; Tao Ma ; Xiao-Yong Ma ; Giovanni Marsella ; Mario Nicola Mazziotta ; Dan Mo ; Maria Mu ; Xiao-Yang Niu ; Xu Pan ; Andrea Parenti ; Wen-Xi Peng ; Xiao-Yan Peng ; Chiara Perrina ; Rui Qiao ; Jia-Ning Rao ; Arshia Ruina ; Zhi Shangguan ; Wei-Hua Shen ; Zhao-Qiang Shen ; Zhong-Tao Shen ; Leandro Silveri ; Jing-Xing Song ; Mikhail Stolpovskiy ; Hong Su ; Meng Su ; Hao-Ran Sun ; Zhi-Yu Sun ; Antonio Surdo ; Xue-Jian Teng ; Andrii Tykhonov ; Jin-Zhou Wang ; Lian-Guo Wang ; Shen Wang ; Shu-Xin Wang ; Xiao-Lian Wang ; Ying Wang ; Yan-Fang Wang ; Yuan-Zhu Wang ; Da-Ming Wei ; Jia-Ju Wei ; Yi-Feng Wei ; Di Wu ; Jian Wu ; Li-Bo Wu ; Sha-Sha Wu ; Xin Wu ; Zi-Qing Xia ; En-Heng Xu ; Hai-Tao Xu ; Zhi-Hui Xu ; Zun-Lei Xu ; Zi-Zong Xu ; Guo-Feng Xue ; Hai-Bo Yang ; Peng Yang ; Ya-Qing Yang ; Hui-Jun Yao ; Yu-Hong Yu ; Guan-Wen Yuan ; Qiang Yuan ; Chuan Yue ; Jing-Jing Zang ; Sheng-Xia Zhang ; Wen-Zhang Zhang ; Yan Zhang ; Yi Zhang ; Yong-Jie Zhang ; Yun-Long Zhang ; Ya-Peng Zhang ; Yong-Qiang Zhang ; Zhe Zhang ; Zhi-Yong Zhang ; Cong Zhao ; Hong-Yun Zhao ; Xun-Feng Zhao ; Chang-Yi Zhou ; Yan Zhu ; Yun-Feng Liang ;
Date:	16 Dec 2021
Abstract:	The DArk Matter Particle Explorer (DAMPE) is well suitable for searching for monochromatic and sharp $gamma$-ray structures in the GeV$-$TeV range thanks to its unprecedented high energy resolution. In this work, we search for $gamma$-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 $chichi o gammagamma$ and the decay lifetime for $chi o gamma u$, 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.
Source:	arXiv, 2112.08860
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