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Title: Cosmic-ray upscattered inelastic dark matter

Journal Article · · Physical Review. D.
ORCiD logo [1];  [2];  [3];  [3];  [4]; ORCiD logo [1];  [5]
  1. Univ. of Melbourne, VIC (Australia)
  2. Sam Houston State University, Huntsville, TX (United States)
  3. Texas A & M Univ., College Station, TX (United States)
  4. Univ. of Hawaii, Honolulu, HI (United States)
  5. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Light non-relativistic components of the galactic dark matter halo elude direct detection constraints because they lack the kinetic energy to create an observable recoil. However, cosmic-rays can upscatter dark matter to significant energies, giving direct detection experiments access to previously unreachable regions of parameter-space at very low dark matter mass. In this work we extend the cosmic-ray dark matter formalism to models of inelastic dark matter and show that previously inaccessible regions of the mass-splitting parameter space can be probed. Conventional direct detection of non-relativistic halo dark matter is limited to mass splittings of δ ~ 10 keV and is highly mass dependent. We find that including the effect of cosmic-ray upscattering can extend the reach to mass splittings of δ ~ 100 MeV, and maintain that reach at much lower dark matter mass.

Research Organization:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); Australian Research Council (ARC); USDOE
Grant/Contract Number:
SC0020250; SC0010813; SC0010504; CE200100008
OSTI ID:
1826850
Alternate ID(s):
OSTI ID: 1903710
Journal Information:
Physical Review. D., Vol. 104, Issue 7; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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