AMS-02 antiprotons from annihilating or decaying dark matter
Recently the AMS-02 experiment reported an excess of cosmic ray antiprotons over the expected astrophysical background. We interpret the excess as a signal from annihilating or decaying dark matter and find that the observed spectrum is well fitted by adding contributions from the annihilation or de...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-07-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315004633 |
| _version_ | 1819209768738226176 |
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| author | Koichi Hamaguchi Takeo Moroi Kazunori Nakayama |
| author_facet | Koichi Hamaguchi Takeo Moroi Kazunori Nakayama |
| author_sort | Koichi Hamaguchi |
| collection | DOAJ |
| description | Recently the AMS-02 experiment reported an excess of cosmic ray antiprotons over the expected astrophysical background. We interpret the excess as a signal from annihilating or decaying dark matter and find that the observed spectrum is well fitted by adding contributions from the annihilation or decay of dark matter with mass of O(TeV) or larger. Interestingly, Wino dark matter with mass of around 3 TeV, whose thermal relic abundance is consistent with present dark matter abundance, can explain the antiproton excess. We also discuss the implications for the decaying gravitino dark matter with R-parity violation. |
| first_indexed | 2024-12-23T06:00:32Z |
| format | Article |
| id | doaj.art-55e224e10741483c9cfd23498a9b3295 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-23T06:00:32Z |
| publishDate | 2015-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-55e224e10741483c9cfd23498a9b32952022-12-21T17:57:42ZengElsevierPhysics Letters B0370-26931873-24452015-07-01747C52352810.1016/j.physletb.2015.06.041AMS-02 antiprotons from annihilating or decaying dark matterKoichi Hamaguchi0Takeo Moroi1Kazunori Nakayama2Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113–0033, JapanDepartment of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113–0033, JapanDepartment of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113–0033, JapanRecently the AMS-02 experiment reported an excess of cosmic ray antiprotons over the expected astrophysical background. We interpret the excess as a signal from annihilating or decaying dark matter and find that the observed spectrum is well fitted by adding contributions from the annihilation or decay of dark matter with mass of O(TeV) or larger. Interestingly, Wino dark matter with mass of around 3 TeV, whose thermal relic abundance is consistent with present dark matter abundance, can explain the antiproton excess. We also discuss the implications for the decaying gravitino dark matter with R-parity violation.http://www.sciencedirect.com/science/article/pii/S0370269315004633 |
| spellingShingle | Koichi Hamaguchi Takeo Moroi Kazunori Nakayama AMS-02 antiprotons from annihilating or decaying dark matter Physics Letters B |
| title | AMS-02 antiprotons from annihilating or decaying dark matter |
| title_full | AMS-02 antiprotons from annihilating or decaying dark matter |
| title_fullStr | AMS-02 antiprotons from annihilating or decaying dark matter |
| title_full_unstemmed | AMS-02 antiprotons from annihilating or decaying dark matter |
| title_short | AMS-02 antiprotons from annihilating or decaying dark matter |
| title_sort | ams 02 antiprotons from annihilating or decaying dark matter |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315004633 |
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