Annihilation of heavy-neutral-fermion pairs into monochromaticγrays and its astrophysical implications
- 15 June 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 39 (12) , 3549-3556
- https://doi.org/10.1103/physrevd.39.3549
Abstract
We present estimates for the rates of the processes χχ→γγ and χχ→Vγ, where χ is a heavy-neutral-fermion candidate for galactic cold dark matter and V is a vector quarkonium state J/ψ(3097) or Υ(9460). A discrepancy with a previous estimate of the rate of the photino pair annihilation process γ̃γ̃→γγ is uncovered and its origin discussed. We explore the possibility that some of the processes considered may be astrophysically significant sources of monochromatic γ-ray lines, in the energy range of a few to a few tens of GeV, for which theoretical estimates of the background γ-ray flux are unfortunately subject to large uncertainties.Keywords
This publication has 23 references indexed in Scilit:
- Supersymmetric relics from the big bangPublished by Elsevier ,2002
- Calculations of relic densities in the early universeNuclear Physics B, 1988
- Detection of Cosmic Dark MatterAnnual Review of Nuclear and Particle Science, 1988
- Cosmic-ray antiprotons, positrons, and gamma rays from halo dark matter annihilationThe Astrophysical Journal, 1988
- Cosmic quarkonium: A probe of dark matterPhysical Review Letters, 1986
- Galactic Antiprotons from PhotinosPhysical Review Letters, 1985
- Cosmic-Ray Antiprotons as a Probe of a Photino-Dominated UniversePhysical Review Letters, 1984
- Constraint on the Photino Mass from CosmologyPhysical Review Letters, 1983
- The cosmic gamma-ray background from the annihilation of primordial stable neutral heavy leptonsThe Astrophysical Journal, 1978
- Some astrophysical consequences of the existence of a heavy stable neutral leptonThe Astrophysical Journal, 1978