Hidden MeV-scale Dark Matter in Neutrino Detectors
The possibility of direct detection of light fermionic dark matter in neutrino detectors is explored from a model-independent standpoint. We consider all operators of dimension six or lower which can contribute to the interaction fp {yields} e{sup +}n, where f is a dark Majorana or Dirac fermion. Constraints on these operators are then obtained from the f lifetime and its decays which produce visible {gamma} rays or electrons. We find one operator which would allow fp {yields} e{sup +}n at interesting rates in neutrino detectors, as long as m{sub f} {approx}< m{sub {pi}}. The existing constraints on light dark matter from relic density arguments, supernova cooling rates, and big-bang nucleosynthesis are then reviewed. We calculate the cross section for fp {yields} e{sup +}n in neutrino detectors implied by this operator, and find that Super-Kamiokande can probe the new physics scale {Lambda} for this interaction up to O(100 TeV).
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 985811
- Report Number(s):
- BNL-93744-2010-JA; R&D Project: 08775; KA1401020; TRN: US1006225
- Journal Information:
- Physical Review, Vol. 80, Issue 11
- Country of Publication:
- United States
- Language:
- English
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