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Title: Attractive scenario for light dark matter direct detection

Abstract

Direct detection of light dark matter (DM), below the GeV scale, through electron recoil can be efficient if DM has a velocity well above the virial value of v ~10–3. We point out that if there is a long range attractive force sourced by bulk ordinary matter, i.e., baryons or electrons, DM can be accelerated towards the Earth and reach velocities v ~ 0.1 near the Earth’s surface. In this “attractive scenario,” all DM will be boosted to high velocities by the time it reaches direct detection apparatuses in laboratories. Furthermore, the attractive force leads to an enhanced DM number density at the Earth, facilitating DM detection even more. We elucidate the implications of this scenario for electron recoil direct detection experiments and find parameters that could lead to potential signals, while being consistent with stellar cooling and other bounds. Our scenario can potentially explain the recent excess in electron recoil signals reported by the XENON1T experiment in the ~ keV energy regime as well as the hint for nonstandard stellar cooling.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1735701
Report Number(s):
BNL-220693-2020-JAAM
Journal ID: ISSN 2470-0010
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 102; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; dark matter; particle dark matter

Citation Formats

Davoudiasl, Hooman, Denton, Peter B., and Gehrlein, Julia. Attractive scenario for light dark matter direct detection. United States: N. p., 2020. Web. https://doi.org/10.1103/physrevd.102.091701.
Davoudiasl, Hooman, Denton, Peter B., & Gehrlein, Julia. Attractive scenario for light dark matter direct detection. United States. https://doi.org/10.1103/physrevd.102.091701
Davoudiasl, Hooman, Denton, Peter B., and Gehrlein, Julia. Mon . "Attractive scenario for light dark matter direct detection". United States. https://doi.org/10.1103/physrevd.102.091701. https://www.osti.gov/servlets/purl/1735701.
@article{osti_1735701,
title = {Attractive scenario for light dark matter direct detection},
author = {Davoudiasl, Hooman and Denton, Peter B. and Gehrlein, Julia},
abstractNote = {Direct detection of light dark matter (DM), below the GeV scale, through electron recoil can be efficient if DM has a velocity well above the virial value of v ~10–3. We point out that if there is a long range attractive force sourced by bulk ordinary matter, i.e., baryons or electrons, DM can be accelerated towards the Earth and reach velocities v ~ 0.1 near the Earth’s surface. In this “attractive scenario,” all DM will be boosted to high velocities by the time it reaches direct detection apparatuses in laboratories. Furthermore, the attractive force leads to an enhanced DM number density at the Earth, facilitating DM detection even more. We elucidate the implications of this scenario for electron recoil direct detection experiments and find parameters that could lead to potential signals, while being consistent with stellar cooling and other bounds. Our scenario can potentially explain the recent excess in electron recoil signals reported by the XENON1T experiment in the ~ keV energy regime as well as the hint for nonstandard stellar cooling.},
doi = {10.1103/physrevd.102.091701},
journal = {Physical Review D},
number = 9,
volume = 102,
place = {United States},
year = {2020},
month = {11}
}

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