Scalar dark matter interpretation of the DAMPE data with U(l) gauge Interactions

	Scalar dark matter interpretation of the DAMPE data with U(l) gauge Interactions
	Cao, Junjie; Feng, Lei; Guo, Xiaofei; Shang, Liangliang; Wang, Fei; Wu, Peiwen
刊名	PHYSICAL REVIEW D
	2018
卷号	97 期号:9 页码:95011
英文摘要	Recently, the Dark Matter Particle Explorer (DAMPE) experiment released the new measurement of the total cosmic e(+) e(-) flux between 25 GeV and 4.6 TeV, which indicates a spectral softening at around 0.9 TeV and a tentative peak at around 1.4 TeV. We utilize a scalar dark matter (DM) model to explain the DAMPE peak by XX -> Z'Z' -> l (l) over barl'(l) over bar 'l with an additional anomaly-free gauged U (l) family symmetry, in which X, Z'and l((')) denote, respectively, the scalar DM, the new gauge boson, and l((')) = e, mu, tau, with m(x) similar to m(z)' similar to 2 x 1.5 (TeV). We first illustrate that the minimal framework Gsm X U(l)(Y') with the above mass choices can explain the DAMPE excess, which, however, be excluded by LHC constraints from the Z' searches. Then, we study a nonminimal framework G(SM) X U(l)(Y') x U(i)(Y") in which U(l)(Y") mixes with U(l)(Y'). We show that such a framework can interpret the DAMPE data and at the same time survive all other constraints including the DM relic abundance, DM direct detection, and collider bounds. We also investigate the predicted e(+) e(-) spectrum in this framework and find that the mass splitting Delta m = m(x) - m(z") should be less than about 17 GeV to produce the peaklike structure.
语种	英语
WOS记录号	WOS:000432972700004
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/17993]
专题	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	Cao, Junjie,Feng, Lei,Guo, Xiaofei,et al. Scalar dark matter interpretation of the DAMPE data with U(l) gauge Interactions[J]. PHYSICAL REVIEW D,2018,97(9):95011.
APA	Cao, Junjie,Feng, Lei,Guo, Xiaofei,Shang, Liangliang,Wang, Fei,&Wu, Peiwen.(2018).Scalar dark matter interpretation of the DAMPE data with U(l) gauge Interactions.PHYSICAL REVIEW D,97(9),95011.
MLA	Cao, Junjie,et al."Scalar dark matter interpretation of the DAMPE data with U(l) gauge Interactions".PHYSICAL REVIEW D 97.9(2018):95011.