Sun heated MeV-scale dark matter and the XENON1T electron recoil excess

doi:10.1007/JHEP04(2021)282

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	Sun heated MeV-scale dark matter and the XENON1T electron recoil excess
	Chen, Yifan ; Cui, Ming-Yang ; Shu, Jing 3,4,5,6,7; Xue, Xiao 3; Yuan, Guan-Wen ; Yuan, Qiang 1,2,6
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2021
期号	4 页码:282
ISSN号	1029-8479
DOI	10.1007/JHEP04(2021)282
英文摘要	The XENON1T collaboration reported an excess of the low-energy electron recoil events between 1 and 7 keV. We explore the possibility to explain such an anomaly by the MeV-scale dark matter (DM) heated by the interior of the Sun due to the same DM-electron interaction as in the detector. The kinetic energies of heated DM particles can reach a few keV, and can potentially account for the excess signals detected by XENON1T. We study different form factors of the DM-electron interactions, F(q) proportional to q(i) with q being the momentum exchange and i = 0, 1, 2, and find that for all these cases the inclusion of the Sun-heated DM component improves the fit to the XENON1T data. The inferred DM-electron scattering cross section (at q = alpha m(e) where alpha is the fine structure constant and m(e) is electron mass) is from similar to 10(-38) cm(2) (for i = 0) to similar to 10(-42) cm(2) (for i = 2). We also derive constraints on the DM-electron cross sections for these form factors, which are stronger than previous results with similar assumptions. We emphasize that the Sun-heated DM scenario relies on the minimum assumption on DM models, which serves as a general explanation of the XENON1T anomaly via DM-electron interaction. The spectrum of the Sun-heated DM is typically soft comparing to other boosted DM, so the small recoil events are expected to be abundant in this scenario. More sensitive direct detection experiments with lower thresholds can possibly distinguish this scenario with other boosted DM models or solar axion models.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27664]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210023, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.DCAS Ctr Excellence Particle Phys, Beijing 100049, Peoples R China 6.Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 7.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 8.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yifan,Cui, Ming-Yang,Shu, Jing,et al. Sun heated MeV-scale dark matter and the XENON1T electron recoil excess[J]. JOURNAL OF HIGH ENERGY PHYSICS,2021(4):282.
APA	Chen, Yifan,Cui, Ming-Yang,Shu, Jing,Xue, Xiao,Yuan, Guan-Wen,&Yuan, Qiang.(2021).Sun heated MeV-scale dark matter and the XENON1T electron recoil excess.JOURNAL OF HIGH ENERGY PHYSICS(4),282.
MLA	Chen, Yifan,et al."Sun heated MeV-scale dark matter and the XENON1T electron recoil excess".JOURNAL OF HIGH ENERGY PHYSICS .4(2021):282.