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Decaying asymmetric dark matter relaxes the AMS-Fermi tension
Feng, Lei1; Kang, Zhaofeng2
2013-10-01
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
Issue10Pages:8--8
Corresponding AuthorFeng, Lei (通讯作者),Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
AbstractThe first result of AMS-02 confirms the positron fraction excess observed by PAMELA, but the spectrum is somewhat softer than that of PAMELA. In the dark matter (DM) interpretation it brings a tension between AMS-02 and Fermi-LAT, which reported an excess of the electron plus positron flux. In this work we point out that the asymmetric cosmic ray from asymmetric dark matter (ADM) decay relaxes the tension. It is found that in the case of two-body decay a bosonic ADM around 2.4 TeV and decaying into mu(-)tau(+) can significantly improve the fits. Based on the R-parity-violating supersymmetry with operators LLEe, we propose a minimal model to realize that ADM. The model introduces only a pair of singlets (X, (X) over bar) with a tiny coupling LHuX, which makes the ADM share the lepton asymmetry and decay into mu(-)tau(+) along the operator LLEe.
KeywordDark Matter Theory Dark Matter Detectors
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1475-7516/2013/10/008
WOS KeywordPOSITRON ; ENERGIES ; MODELS ; EXCESS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000326979500008
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9889
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Feng, Lei,Kang, Zhaofeng. Decaying asymmetric dark matter relaxes the AMS-Fermi tension[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013(10):8--8.
APA Feng, Lei,&Kang, Zhaofeng.(2013).Decaying asymmetric dark matter relaxes the AMS-Fermi tension.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(10),8--8.
MLA Feng, Lei,et al."Decaying asymmetric dark matter relaxes the AMS-Fermi tension".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .10(2013):8--8.
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