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Title: Boosted Dark Matter Interpretation of the XENON1T Excess

Abstract

We propose boosted dark matter (BDM) as a possible explanation for the excess of keV electron recoil events observed by XENON1T. BDM particles have velocities much larger than those typical of virialized dark matter, and, as such, BDM-electron scattering can naturally produce keV electron recoils. We show that the required BDM-electron scattering cross sections can be easily realized in a simple model with a heavy vector mediator. Though these cross sections are too large for BDM to escape from the Sun, the BDM flux can originate from the Galactic Center or from halo dark matter annihilations. Furthermore, a daily modulation of the BDM signal will be present, which could not only be used to differentiate it from various backgrounds but would also provide important directional information for the BDM flux.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo; ;
Publication Date:
Research Org.:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences; Research Grants Council of Hong Kong
OSTI Identifier:
1671859
Alternate Identifier(s):
OSTI ID: 1851236
Grant/Contract Number:  
SC0009959; PHY-1720282; 11947302; 11690022; 11851302; 11675243; 11761141011; XDB21010200; XDB23000000; 17305517
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 125 Journal Issue: 16; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Physics; Particle dark matter; Particle astrophysics; Cosmic rays and astroparticles; Cosmology; Dark matter

Citation Formats

Fornal, Bartosz, Sandick, Pearl, Shu, Jing, Su, Meng, and Zhao, Yue. Boosted Dark Matter Interpretation of the XENON1T Excess. United States: N. p., 2020. Web. doi:10.1103/PhysRevLett.125.161804.
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Fornal, Bartosz, Sandick, Pearl, Shu, Jing, Su, Meng, & Zhao, Yue. Boosted Dark Matter Interpretation of the XENON1T Excess. United States. https://doi.org/10.1103/PhysRevLett.125.161804
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Fornal, Bartosz, Sandick, Pearl, Shu, Jing, Su, Meng, and Zhao, Yue. Mon . "Boosted Dark Matter Interpretation of the XENON1T Excess". United States. https://doi.org/10.1103/PhysRevLett.125.161804.
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@article{osti_1671859,
title = {Boosted Dark Matter Interpretation of the XENON1T Excess},
author = {Fornal, Bartosz and Sandick, Pearl and Shu, Jing and Su, Meng and Zhao, Yue},
abstractNote = {We propose boosted dark matter (BDM) as a possible explanation for the excess of keV electron recoil events observed by XENON1T. BDM particles have velocities much larger than those typical of virialized dark matter, and, as such, BDM-electron scattering can naturally produce keV electron recoils. We show that the required BDM-electron scattering cross sections can be easily realized in a simple model with a heavy vector mediator. Though these cross sections are too large for BDM to escape from the Sun, the BDM flux can originate from the Galactic Center or from halo dark matter annihilations. Furthermore, a daily modulation of the BDM signal will be present, which could not only be used to differentiate it from various backgrounds but would also provide important directional information for the BDM flux.},
doi = {10.1103/PhysRevLett.125.161804},
journal = {Physical Review Letters},
number = 16,
volume = 125,
place = {United States},
year = {2020},
month = {10}
}
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https://doi.org/10.1103/PhysRevLett.125.161804
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