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Type: Journal article
Title: Global fits of axion-like particles to XENON1T and astrophysical data
Author: Athron, P.
Balázs, C.
Beniwal, A.
Camargo-Molina, J.E.
Fowlie, A.
Gonzalo, T.E.
Hoof, S.
Kahlhoefer, F.
Marsh, D.J.E.
Prim, M.T.
Scaffidi, A.
Scott, P.
Su, W.
White, M.
Wu, L.
Zhang, Y.
Citation: The Journal of High Energy Physics, 2021; 2021(5):1-40
Publisher: Springer Science and Business Media
Issue Date: 2021
ISSN: 1029-8479
Statement of
Peter Athron, Csaba Balázs, Ankit Beniwal, J. Eliel Camargo-Molina, Andrew Fowlie, Tomás E. Gonzalo ... et al.
Abstract: The excess of electron recoil events seen by the XENON1T experiment has been interpreted as a potential signal of axion-like particles (ALPs), either produced in the Sun, or constituting part of the dark matter halo of the Milky Way. It has also been explained as a consequence of trace amounts of tritium in the experiment. We consider the evidence for the solar and dark-matter ALP hypotheses from the combination of XENON1T data and multiple astrophysical probes, including horizontal branch stars, red giants, and white dwarfs. We briefly address the influence of ALP decays and supernova cooling. While the different datasets are in clear tension for the case of solar ALPs, all measurements can be simultaneously accommodated for the case of a sub-dominant fraction of dark-matter ALPs. Nevertheless, this solution requires the tuning of several a priori unknown parameters, such that for our choices of priors a Bayesian analysis shows no strong preference for the ALP interpretation of the XENON1T excess over the background hypothesis.
Keywords: Beyond Standard Model; cosmology of theories beyond the SM
Rights: Open Access, © The Authors. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
DOI: 10.1007/JHEP05(2021)159
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