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Cosmic Imprints of XENON1T Axions
| dc.contributor.author | Arias Aragón, Fernando | |
| dc.contributor.author | D'Eramo, Francesco | |
| dc.contributor.author | Ferreira, Ricardo Z. | |
| dc.contributor.author | Merlo, Luca | |
| dc.contributor.author | Notari, Alessio | |
| dc.date.accessioned | 2026-02-13T09:13:58Z | |
| dc.date.issued | 2020-11-13 | |
| dc.description.abstract | The recent electron recoil excess observed by XENON1T has a possible interpretation in terms of solar axions coupled to electrons. If such axions are still relativistic at recombination they would also leave a cosmic imprint in the form of an additional radiation component, parameterized by an effective neutrino number Δ Neff. We explore minimal scenarios with a detectable signal in future CMB surveys: axions coupled democratically to all fermions, axion-electron coupling generated radiatively, the DFSZ framework for the QCD axion. The predicted Δ Neff is larger than 0.03–0.04 for all cases, close to the 2σ forecasted sensitivity of CMB-S4 experiments. This opens the possibility of testing with cosmological observations the solar axion interpretation of the XENON1T excess. | |
| dc.identifier.citation | Fernando Arias-Aragón et al JCAP11(2020)025 | |
| dc.identifier.doi | 10.1088/1475-7516/2020/11/025 | |
| dc.identifier.issn | 1475-7516 | |
| dc.identifier.uri | https://hdl.handle.net/10115/166677 | |
| dc.language.iso | en | |
| dc.publisher | IOP Publishing Ltd and Sissa Medialab | |
| dc.rights.accessRights | info:eu-repo/semantics/closedAccess | |
| dc.subject | Axions | |
| dc.subject | XENON1T | |
| dc.subject | Astroparticles | |
| dc.subject | Cosmology | |
| dc.title | Cosmic Imprints of XENON1T Axions | |
| dc.type | Article | |
| dc.type.hasVersion | http://purl.org/coar/version/c_970fb48d4fbd8a85 |