Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbers
The recently observed excess in gamma-ray signal near the Galactic center suggests that dark matter particles may annihilate into charged fermions that produce gamma-ray to be observed. In this paper, we consider a leptonic dark matter, which annihilates into the standard model leptons, μ+μ− and τ+τ...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2016-01-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315008837 |
| _version_ | 1818276939270455296 |
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| author | Jong-Chul Park Jongkuk Kim Seong Chan Park |
| author_facet | Jong-Chul Park Jongkuk Kim Seong Chan Park |
| author_sort | Jong-Chul Park |
| collection | DOAJ |
| description | The recently observed excess in gamma-ray signal near the Galactic center suggests that dark matter particles may annihilate into charged fermions that produce gamma-ray to be observed. In this paper, we consider a leptonic dark matter, which annihilates into the standard model leptons, μ+μ− and τ+τ−, by the interaction of the gauged lepton number U(1)Lμ−Lτ and fits the observed excess. Interestingly, the necessary annihilation cross section for the observed gamma-ray flux provides a good fit to the value for the relic abundance of dark matter. We identify the preferred parameter space of the model after taking the existing experimental constraints from the precision measurements including the muon (g−2), tau decay, neutrino trident production, dark matter direct detection, LHC, and LEP experiments. |
| first_indexed | 2024-12-12T22:53:37Z |
| format | Article |
| id | doaj.art-66a87f379846421384719cd27b06a84e |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-12T22:53:37Z |
| publishDate | 2016-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-66a87f379846421384719cd27b06a84e2022-12-22T00:09:00ZengElsevierPhysics Letters B0370-26931873-24452016-01-01752C596510.1016/j.physletb.2015.11.035Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbersJong-Chul Park0Jongkuk Kim1Seong Chan Park2Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of KoreaDepartment of Physics, Sungkyunkwan University, Suwon 440-746, Republic of KoreaDepartment of Physics & IPAP, Yonsei University, Seoul 120-749, Republic of KoreaThe recently observed excess in gamma-ray signal near the Galactic center suggests that dark matter particles may annihilate into charged fermions that produce gamma-ray to be observed. In this paper, we consider a leptonic dark matter, which annihilates into the standard model leptons, μ+μ− and τ+τ−, by the interaction of the gauged lepton number U(1)Lμ−Lτ and fits the observed excess. Interestingly, the necessary annihilation cross section for the observed gamma-ray flux provides a good fit to the value for the relic abundance of dark matter. We identify the preferred parameter space of the model after taking the existing experimental constraints from the precision measurements including the muon (g−2), tau decay, neutrino trident production, dark matter direct detection, LHC, and LEP experiments.http://www.sciencedirect.com/science/article/pii/S0370269315008837Leptophilic dark matterGamma-rayFermi-LAT GeV excessU(1)Lμ−Lτ |
| spellingShingle | Jong-Chul Park Jongkuk Kim Seong Chan Park Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbers Physics Letters B Leptophilic dark matter Gamma-ray Fermi-LAT GeV excess U(1)Lμ−Lτ |
| title | Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbers |
| title_full | Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbers |
| title_fullStr | Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbers |
| title_full_unstemmed | Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbers |
| title_short | Galactic center GeV gamma-ray excess, from dark matter with gauged lepton numbers |
| title_sort | galactic center gev gamma ray excess from dark matter with gauged lepton numbers |
| topic | Leptophilic dark matter Gamma-ray Fermi-LAT GeV excess U(1)Lμ−Lτ |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315008837 |
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