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Liu, GL; Wang, F; Wang, WY; Yang, JM
Explaining DAMPE results by dark matter with hierarchical lepton-specific Yukawa interactions
Source PublicationCHINESE PHYSICS C
Language英语
KeywordPARAMETERS
AbstractWe propose to interpret the DAMPE electron excess at 1.5 TeV through scalar or Dirac fermion dark matter (DM) annihilation with doubly charged scalar mediators that have lepton-specific Yukawa couplings. The hierarchy of such lepton-specific Yukawa couplings is generated through the Froggatt-Nielsen mechanism, so that the dark matter annihilation products can be dominantly electrons. Stringent constraints from LEP2 on intermediate vector boson production can be evaded in our scenarios. In the case of scalar DM, we discuss one scenario with DM annihilating directly to leptons and another scenario with DM annihilating to scalar mediators followed by their decays. We also discuss the Breit-Wigner resonant enhancement and the Sommerfeld enhancement in the case where the s-wave annihilation process is small or helicity-suppressed. With both types of enhancement, constraints on the parameters can be relaxed and new ways for model building can be opened in explaining the DAMPE results.
2018
ISSN1674-1137
Volume42Issue:3Pages:UNSP 035101
Subject AreaPhysics
MOST Discipline CataloguePhysics, Nuclear ; Physics, Particles & Fields
DOI10.1088/1674-1137/42/3/035101
Indexed BySCIE
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/22944
Collection理论物理所科研产出_SCI论文
Affiliation1.Zhengzhou Univ, Sch Phys, Zhengzhou 450000, Henan, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
3.Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
4.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
5.Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
Recommended Citation
GB/T 7714
Liu, GL,Wang, F,Wang, WY,et al. Explaining DAMPE results by dark matter with hierarchical lepton-specific Yukawa interactions[J]. CHINESE PHYSICS C,2018,42(3):UNSP 035101.
APA Liu, GL,Wang, F,Wang, WY,&Yang, JM.(2018).Explaining DAMPE results by dark matter with hierarchical lepton-specific Yukawa interactions.CHINESE PHYSICS C,42(3),UNSP 035101.
MLA Liu, GL,et al."Explaining DAMPE results by dark matter with hierarchical lepton-specific Yukawa interactions".CHINESE PHYSICS C 42.3(2018):UNSP 035101.
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