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Title: Prospects for detecting a net photon circular polarization produced by decaying dark matter

Abstract

If dark matter interactions with Standard Model particles are CP-violating, then dark matter annihilation/decay can produce photons with a net circular polarization. We consider the prospects for experimentally detecting evidence for such a circular polarization. We identify optimal models for dark matter interactions with the Standard Model, from the point of view of detectability of the net polarization, for the case of either symmetric or asymmetric dark matter. Furthermore, we find that, for symmetric dark matter, evidence for net polarization could be found by a search of the Galactic Center by an instrument sensitive to circular polarization with an efficiency-weighted exposure of at least 50000 cm 2 yr, provided the systematic detector uncertainties are constrained at the 1% level. Better sensitivity can be obtained in the case of asymmetric dark matter. We report on the prospects for achieving the needed level of performance using possible detector technologies.

Authors:
 [1];  [2];  [3];  [4]
  1. Univ. of Chicago, IL (United States). Enrico Fermi Inst.
  2. Univ. of Hawaii, Honolulu, HI (United States). Dept. of Physics and Astronomy
  3. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy
  4. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy; Uppsala Univ. (Sweden)
Publication Date:
Research Org.:
Univ. of Hawaii, Honolulu, HI (United States); Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
OSTI Identifier:
1598607
Alternate Identifier(s):
OSTI ID: 1408561
Grant/Contract Number:  
SC0010504; SC0008172; PHY-1066014; PHY-1250573; PHY-1417367; PHY-1720282
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; 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

Citation Formats

Elagin, Andrey, Kumar, Jason, Sandick, Pearl, and Teng, Fei. Prospects for detecting a net photon circular polarization produced by decaying dark matter. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.096008.
Elagin, Andrey, Kumar, Jason, Sandick, Pearl, & Teng, Fei. Prospects for detecting a net photon circular polarization produced by decaying dark matter. United States. doi:10.1103/PhysRevD.96.096008.
Elagin, Andrey, Kumar, Jason, Sandick, Pearl, and Teng, Fei. Mon . "Prospects for detecting a net photon circular polarization produced by decaying dark matter". United States. doi:10.1103/PhysRevD.96.096008. https://www.osti.gov/servlets/purl/1598607.
@article{osti_1598607,
title = {Prospects for detecting a net photon circular polarization produced by decaying dark matter},
author = {Elagin, Andrey and Kumar, Jason and Sandick, Pearl and Teng, Fei},
abstractNote = {If dark matter interactions with Standard Model particles are CP-violating, then dark matter annihilation/decay can produce photons with a net circular polarization. We consider the prospects for experimentally detecting evidence for such a circular polarization. We identify optimal models for dark matter interactions with the Standard Model, from the point of view of detectability of the net polarization, for the case of either symmetric or asymmetric dark matter. Furthermore, we find that, for symmetric dark matter, evidence for net polarization could be found by a search of the Galactic Center by an instrument sensitive to circular polarization with an efficiency-weighted exposure of at least 50000 cm2 yr, provided the systematic detector uncertainties are constrained at the 1% level. Better sensitivity can be obtained in the case of asymmetric dark matter. We report on the prospects for achieving the needed level of performance using possible detector technologies.},
doi = {10.1103/PhysRevD.96.096008},
journal = {Physical Review D},
number = 9,
volume = 96,
place = {United States},
year = {2017},
month = {11}
}

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