Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess
Abstract Recently, the XENON1T collaboration reported an excess in the electron recoil energy spectrum. One of the simplest new physics interpretation is a new neutrino-electron interaction mediated by a light vector particle. However, for the parameter region favored by this excess, the constraints...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-12-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP12(2020)004 |
| _version_ | 1827793607236517888 |
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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 Recently, the XENON1T collaboration reported an excess in the electron recoil energy spectrum. One of the simplest new physics interpretation is a new neutrino-electron interaction mediated by a light vector particle. However, for the parameter region favored by this excess, the constraints from the stellar cooling are severe. Still, there are astrophysical uncertainties on those constraints. In this paper, we discuss the constraint on the light mediator from the effective number of neutrino N eff in the CMB era, which provides an independent constraint. We show that N eff is significantly enhanced and exceeds the current constraint in the parameter region favored for the XENON1T excess. As a result, the interpretation by a light mediator heavier than about 1 eV is excluded by the N eff constraint. |
| first_indexed | 2024-03-11T18:20:53Z |
| format | Article |
| id | doaj.art-31760bb3695b4b0f97df1bc1b421a1dc |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-11T18:20:53Z |
| publishDate | 2020-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-31760bb3695b4b0f97df1bc1b421a1dc2023-10-15T11:04:37ZengSpringerOpenJournal of High Energy Physics1029-84792020-12-0120201211910.1007/JHEP12(2020)004Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excessMasahiro 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 Recently, the XENON1T collaboration reported an excess in the electron recoil energy spectrum. One of the simplest new physics interpretation is a new neutrino-electron interaction mediated by a light vector particle. However, for the parameter region favored by this excess, the constraints from the stellar cooling are severe. Still, there are astrophysical uncertainties on those constraints. In this paper, we discuss the constraint on the light mediator from the effective number of neutrino N eff in the CMB era, which provides an independent constraint. We show that N eff is significantly enhanced and exceeds the current constraint in the parameter region favored for the XENON1T excess. As a result, the interpretation by a light mediator heavier than about 1 eV is excluded by the N eff constraint.https://doi.org/10.1007/JHEP12(2020)004Beyond Standard ModelCosmology of Theories beyond the SM |
| spellingShingle | Masahiro Ibe Shin Kobayashi Yuhei Nakayama Satoshi Shirai Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM |
| title | Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess |
| title_full | Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess |
| title_fullStr | Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess |
| title_full_unstemmed | Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess |
| title_short | Cosmological constraint on vector mediator of neutrino-electron interaction in light of XENON1T excess |
| title_sort | cosmological constraint on vector mediator of neutrino electron interaction in light of xenon1t excess |
| topic | Beyond Standard Model Cosmology of Theories beyond the SM |
| url | https://doi.org/10.1007/JHEP12(2020)004 |
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