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Title: Discovering supernova-produced dark matter with directional detectors

Abstract

Supernovae can produce vast fluxes of new particles with masses on the MeV scale, a mass scale of interest for models of light dark matter. When these new particles become diffusively trapped within the supernova, the escaping flux will emerge semirelativistic with an order-one spread in velocities. As a result, overlapping emissions from Galactic supernovae will produce an overall flux of these particles at Earth that is approximately constant in time. However, this flux is highly anisotropic and is steeply peaked toward the Galactic center. This is in contrast with the cosmological abundance of a weakly interacting massive particles (WIMP)-like dark matter which, due to the rotation of the Galaxy, appears to come from the direction of the Cygnus constellation. In this paper, we demonstrate the need for a directional detector to efficiently discriminate between a signal from a cold cosmological abundance of GeV-scale WIMPs and a signal from a hot population of supernova-produced MeV-scale dark matter.

Authors:
; ORCiD logo;
Publication Date:
Research Org.:
Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Heising-Simons Foundation; Gordon and Betty Moore Foundation; European Research Council (ERC)
OSTI Identifier:
1690328
Alternate Identifier(s):
OSTI ID: 1851590
Grant/Contract Number:  
SC0012012; 100495; PHY-1720397; 2015-037; 2018-0765; GBMF7946; 818744
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 102 Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics; Particle dark matter; Particle astrophysics; Cosmic rays and astroparticles; Cosmology; Dark matter; Weakly interacting massive particles; Gaseous detectors; Particle detectors

Citation Formats

Baracchini, Elisabetta, DeRocco, William, and Dho, Giorgio. Discovering supernova-produced dark matter with directional detectors. United States: N. p., 2020. Web. doi:10.1103/PhysRevD.102.075036.
Baracchini, Elisabetta, DeRocco, William, & Dho, Giorgio. Discovering supernova-produced dark matter with directional detectors. United States. https://doi.org/10.1103/PhysRevD.102.075036
Baracchini, Elisabetta, DeRocco, William, and Dho, Giorgio. Tue . "Discovering supernova-produced dark matter with directional detectors". United States. https://doi.org/10.1103/PhysRevD.102.075036.
@article{osti_1690328,
title = {Discovering supernova-produced dark matter with directional detectors},
author = {Baracchini, Elisabetta and DeRocco, William and Dho, Giorgio},
abstractNote = {Supernovae can produce vast fluxes of new particles with masses on the MeV scale, a mass scale of interest for models of light dark matter. When these new particles become diffusively trapped within the supernova, the escaping flux will emerge semirelativistic with an order-one spread in velocities. As a result, overlapping emissions from Galactic supernovae will produce an overall flux of these particles at Earth that is approximately constant in time. However, this flux is highly anisotropic and is steeply peaked toward the Galactic center. This is in contrast with the cosmological abundance of a weakly interacting massive particles (WIMP)-like dark matter which, due to the rotation of the Galaxy, appears to come from the direction of the Cygnus constellation. In this paper, we demonstrate the need for a directional detector to efficiently discriminate between a signal from a cold cosmological abundance of GeV-scale WIMPs and a signal from a hot population of supernova-produced MeV-scale dark matter.},
doi = {10.1103/PhysRevD.102.075036},
journal = {Physical Review D},
number = 7,
volume = 102,
place = {United States},
year = {Tue Oct 27 00:00:00 EDT 2020},
month = {Tue Oct 27 00:00:00 EDT 2020}
}

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