Annual modulation of cosmic relic neutrinos
The cosmic neutrino background (CνB), produced about one second after the big bang, permeates the Universe today. New technological advancements make neutrino capture on beta-decaying nuclei (NCB) a clear path forward towards the detection of the CνB. We show that gravitational focusing by the Sun c...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88672 https://orcid.org/0000-0002-3757-9883 |
| _version_ | 1826203610841612288 |
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| author | Safdi, Benjamin R. Lisanti, Mariangela Formaggio, Joseph A. Spitz, Joshua B. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Safdi, Benjamin R. Lisanti, Mariangela Formaggio, Joseph A. Spitz, Joshua B. |
| author_sort | Safdi, Benjamin R. |
| collection | MIT |
| description | The cosmic neutrino background (CνB), produced about one second after the big bang, permeates the Universe today. New technological advancements make neutrino capture on beta-decaying nuclei (NCB) a clear path forward towards the detection of the CνB. We show that gravitational focusing by the Sun causes the expected neutrino capture rate to modulate annually. The amplitude and phase of the modulation depend on the phase-space distribution of the local neutrino background, which is perturbed by structure formation. These results also apply to searches for sterile neutrinos at NCB experiments. Gravitational focusing is the only source of modulation for neutrino capture experiments, in contrast to dark-matter direct-detection searches where the Earth’s time-dependent velocity relative to the Sun also plays a role. |
| first_indexed | 2024-09-23T12:40:20Z |
| format | Article |
| id | mit-1721.1/88672 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:40:20Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/886722022-09-28T09:19:17Z Annual modulation of cosmic relic neutrinos Safdi, Benjamin R. Lisanti, Mariangela Formaggio, Joseph A. Spitz, Joshua B. Massachusetts Institute of Technology. Department of Physics Spitz, Joshua B. Formaggio, Joseph A. The cosmic neutrino background (CνB), produced about one second after the big bang, permeates the Universe today. New technological advancements make neutrino capture on beta-decaying nuclei (NCB) a clear path forward towards the detection of the CνB. We show that gravitational focusing by the Sun causes the expected neutrino capture rate to modulate annually. The amplitude and phase of the modulation depend on the phase-space distribution of the local neutrino background, which is perturbed by structure formation. These results also apply to searches for sterile neutrinos at NCB experiments. Gravitational focusing is the only source of modulation for neutrino capture experiments, in contrast to dark-matter direct-detection searches where the Earth’s time-dependent velocity relative to the Sun also plays a role. MIT Department of Physics Pappalardo Program National Science Foundation (U.S.) (Grant PHY-1205175) National Science Foundation (U.S.) (Grant PHY-1205100) 2014-08-11T17:33:22Z 2014-08-11T17:33:22Z 2014-08 2014-04 2014-08-01T22:00:04Z Article http://purl.org/eprint/type/JournalArticle 1550-7998 1550-2368 http://hdl.handle.net/1721.1/88672 Safdi, Benjamin R., Mariangela Lisanti, Joshua Spitz, and Joseph A. Formaggio. "Annual modulation of cosmic relic neutrinos." Phys. Rev. D 90, 043001 (August 2014). © 2014 American Physical Society https://orcid.org/0000-0002-3757-9883 en http://dx.doi.org/10.1103/PhysRevD.90.043001 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Safdi, Benjamin R. Lisanti, Mariangela Formaggio, Joseph A. Spitz, Joshua B. Annual modulation of cosmic relic neutrinos |
| title | Annual modulation of cosmic relic neutrinos |
| title_full | Annual modulation of cosmic relic neutrinos |
| title_fullStr | Annual modulation of cosmic relic neutrinos |
| title_full_unstemmed | Annual modulation of cosmic relic neutrinos |
| title_short | Annual modulation of cosmic relic neutrinos |
| title_sort | annual modulation of cosmic relic neutrinos |
| url | http://hdl.handle.net/1721.1/88672 https://orcid.org/0000-0002-3757-9883 |
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