Explaining the DAMPE data with scalar dark matter and gauged U(1)(Le- L mu) interaction
Cao, Junjie1,2; Feng, Lei3; Guo, Xiaofei1; Shang, Liangliang1; Wang, Fei1,4; Wu, Peiwen5; Zu, Lei3,6

Inspired by the peak structure observed by recent DAMPE experiment in e(+)e(-) cosmic-ray spectrum, we consider a scalar dark matter (DM) model with gauged U(1)(Le-L mu) symmetry, which is the most economical anomaly-free theory to potentially explain the peak by DM annihilation in nearby subhalo. We utilize the process chi chi -> Z'Z' -> l (l) over barl'(l) over bar' , where chi, Z', l(()'()) denote the scalar DM, the new gauge boson and l(()'()) = e, mu, respectively, to generate the e(+)e(-) spectrum. By fitting the predicted spectrum to the experimental data, we obtain the favored DM mass range m(chi) similar or equal to 3060(-100)(+80) GeV and Delta m = m(chi) - m(Z') less than or similar to 14 GeV at 68% 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 m(Z') arising from the cross section measurement of e(+)e(-) -> Z'* -> e(+)e(-).

Indexed BySCI
WOS Research AreaPhysics
WOS SubjectPhysics, Particles & Fields
WOS IDWOS:000427619600002
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Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorCao, Junjie
Affiliation1.Henan Normal Univ, Coll Phys & Mat Sci, Xinxiang 453007, Peoples R China
2.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
4.Zhengzhou Univ, Sch Phys, Zhengzhou 450000, Henan, Peoples R China
5.KIAS, Sch Phys, 85 Hoegiro, Seoul 02455, South Korea
6.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
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Cao, Junjie,Feng, Lei,Guo, Xiaofei,et al. Explaining the DAMPE data with scalar dark matter and gauged U(1)(Le- L mu) interaction[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(3):9.
APA Cao, Junjie.,Feng, Lei.,Guo, Xiaofei.,Shang, Liangliang.,Wang, Fei.,...&Zu, Lei.(2018).Explaining the DAMPE data with scalar dark matter and gauged U(1)(Le- L mu) interaction.EUROPEAN PHYSICAL JOURNAL C,78(3),9.
MLA Cao, Junjie,et al."Explaining the DAMPE data with scalar dark matter and gauged U(1)(Le- L mu) interaction".EUROPEAN PHYSICAL JOURNAL C 78.3(2018):9.
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