Cosmological constraint on dark photon from N eff
Abstract A new U (1) gauge symmetry is the simplest extension of the Standard Model and has various theoretical and phenomenological motivations. In this paper, we study the cosmological constraint on the MeV scale dark photon. After the neutrino decoupling era at T = O(1) MeV, the decay and annihil...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-04-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP04(2020)009 |
| _version_ | 1818202352361930752 |
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| author | Masahiro Ibe Shin Kobayashi Yuhei Nakayama Satoshi Shirai |
| author_facet | Masahiro Ibe Shin Kobayashi Yuhei Nakayama Satoshi Shirai |
| author_sort | Masahiro Ibe |
| collection | DOAJ |
| description | Abstract A new U (1) gauge symmetry is the simplest extension of the Standard Model and has various theoretical and phenomenological motivations. In this paper, we study the cosmological constraint on the MeV scale dark photon. After the neutrino decoupling era at T = O(1) MeV, the decay and annihilation of the dark photon heats up the electron and photon plasma and accordingly decreases the effective number of neutrino N eff in the recombination era. We derive a conservative lower-limit of the dark photon mass around 8.5 MeV from the current Planck data if the mixing between the dark photon and ordinary photon is larger than O(10 −9). We also find that the future CMB stage-IV experiments can probe up to 17 MeV dark photon. |
| first_indexed | 2024-12-12T03:08:05Z |
| format | Article |
| id | doaj.art-092bd97368f34b798c8084bc08c1666e |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-12T03:08:05Z |
| publishDate | 2020-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-092bd97368f34b798c8084bc08c1666e2022-12-22T00:40:27ZengSpringerOpenJournal of High Energy Physics1029-84792020-04-012020412010.1007/JHEP04(2020)009Cosmological constraint on dark photon from N effMasahiro Ibe0Shin Kobayashi1Yuhei Nakayama2Satoshi Shirai3ICRR, The University of TokyoICRR, The University of TokyoICRR, The University of TokyoKavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, The University of TokyoAbstract A new U (1) gauge symmetry is the simplest extension of the Standard Model and has various theoretical and phenomenological motivations. In this paper, we study the cosmological constraint on the MeV scale dark photon. After the neutrino decoupling era at T = O(1) MeV, the decay and annihilation of the dark photon heats up the electron and photon plasma and accordingly decreases the effective number of neutrino N eff in the recombination era. We derive a conservative lower-limit of the dark photon mass around 8.5 MeV from the current Planck data if the mixing between the dark photon and ordinary photon is larger than O(10 −9). We also find that the future CMB stage-IV experiments can probe up to 17 MeV dark photon.http://link.springer.com/article/10.1007/JHEP04(2020)009Beyond Standard ModelCosmology of Theories beyond the SM |
| spellingShingle | Masahiro Ibe Shin Kobayashi Yuhei Nakayama Satoshi Shirai Cosmological constraint on dark photon from N eff Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM |
| title | Cosmological constraint on dark photon from N eff |
| title_full | Cosmological constraint on dark photon from N eff |
| title_fullStr | Cosmological constraint on dark photon from N eff |
| title_full_unstemmed | Cosmological constraint on dark photon from N eff |
| title_short | Cosmological constraint on dark photon from N eff |
| title_sort | cosmological constraint on dark photon from n eff |
| topic | Beyond Standard Model Cosmology of Theories beyond the SM |
| url | http://link.springer.com/article/10.1007/JHEP04(2020)009 |
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