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Title: Reexamining the Solar Axion Explanation for the XENON1T Excess

Abstract

The XENON1T collaboration has observed an excess in electronic recoil events below 5 keV over the known background, which could originate from beyond-the-Standard-Model physics. The solar axion is a well-motivated model that has been proposed to explain the excess, though it has tension with astrophysical observations. The axions traveled from the Sun can be absorbed by the electrons in the xenon atoms via the axion-electron coupling. Meanwhile, they can also scatter with the atoms through the inverse Primakoff process via the axion-photon coupling, which emits a photon and mimics the electronic recoil signals. We found that the latter process cannot be neglected. After including the keV photon produced via inverse Primakoff in the detection, the tension with the astrophysical constraints can be significantly reduced. We also explore scenarios involving additional new physics to further alleviate the tension with the astrophysical bounds.

Authors:
ORCiD logo; ORCiD logo; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1665895
Alternate Identifier(s):
OSTI ID: 1661687; OSTI ID: 1735348
Report Number(s):
arXiv:2006.14598; EFI-20-13; FERMILAB-PUB-20-388-T
Journal ID: ISSN 0031-9007; PRLTAO; 131806
Grant/Contract Number:  
SC0013642; AC02-06CH11357; SC0010296; AC02-07CH11359; SC0009924
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 125 Journal Issue: 13; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Axions; Hypothetical gauge bosons; Dark matter detectors; Scintillators

Citation Formats

Gao, Christina, Liu, Jia, Wang, Lian-Tao, Wang, Xiao-Ping, Xue, Wei, and Zhong, Yi-Ming. Reexamining the Solar Axion Explanation for the XENON1T Excess. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevLett.125.131806.
Gao, Christina, Liu, Jia, Wang, Lian-Tao, Wang, Xiao-Ping, Xue, Wei, & Zhong, Yi-Ming. Reexamining the Solar Axion Explanation for the XENON1T Excess. United States. https://doi.org/10.1103/PhysRevLett.125.131806
Gao, Christina, Liu, Jia, Wang, Lian-Tao, Wang, Xiao-Ping, Xue, Wei, and Zhong, Yi-Ming. Thu . "Reexamining the Solar Axion Explanation for the XENON1T Excess". United States. https://doi.org/10.1103/PhysRevLett.125.131806.
@article{osti_1665895,
title = {Reexamining the Solar Axion Explanation for the XENON1T Excess},
author = {Gao, Christina and Liu, Jia and Wang, Lian-Tao and Wang, Xiao-Ping and Xue, Wei and Zhong, Yi-Ming},
abstractNote = {The XENON1T collaboration has observed an excess in electronic recoil events below 5 keV over the known background, which could originate from beyond-the-Standard-Model physics. The solar axion is a well-motivated model that has been proposed to explain the excess, though it has tension with astrophysical observations. The axions traveled from the Sun can be absorbed by the electrons in the xenon atoms via the axion-electron coupling. Meanwhile, they can also scatter with the atoms through the inverse Primakoff process via the axion-photon coupling, which emits a photon and mimics the electronic recoil signals. We found that the latter process cannot be neglected. After including the keV photon produced via inverse Primakoff in the detection, the tension with the astrophysical constraints can be significantly reduced. We also explore scenarios involving additional new physics to further alleviate the tension with the astrophysical bounds.},
doi = {10.1103/PhysRevLett.125.131806},
journal = {Physical Review Letters},
number = 13,
volume = 125,
place = {United States},
year = {2020},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
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https://doi.org/10.1103/PhysRevLett.125.131806

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