Annihilation of heavy-neutral-fermion pairs into monochromatic. gamma. rays and its astrophysical implications

Journal Article · Thu Jun 15 04:00:00 EDT 1989 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.39.3549· OSTI ID:5897478

Rudaz, S

We present estimates for the rates of the processes xixi/r arrow/..gamma gamma..and xixi/r arrow//ital V/..gamma.., where xi is a heavy-neutral-fermion candidatefor galactic cold dark matter and /ital V/ is a vector quarkonium state/ital J///psi/(3097) or UPSILON(9460). A discrepancy with a previous estimateof the rate of the photino pair annihilation process/gamma/tilde ///gamma/tilde ///r arrow/..gamma gamma.. is uncovered and its origin discussed. We explorethe possibility that some of the processes considered may be astrophysicallysignificant sources of monochromatic ..gamma..-ray lines, in the energy rangeof a few to a few tens of GeV, for which theoretical estimates of thebackground ..gamma..-ray flux are unfortunately subject to large uncertainties.

• Research Organization: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455(US)
• OSTI ID: 5897478
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 39:12; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

640106 -- Astrophysics & Cosmology-- Cosmology
645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
ASTROPHYSICS
BASIC INTERACTIONS
BOSONS
BOTTOMONIUM
CHARMONIUM
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
GALAXIES
GAMMA RADIATION
HADRONS
HIGGS BOSONS
INTERACTIONS
IONIZING RADIATIONS
J PSI-3097 MESONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
NEUTRAL PARTICLES
NONLUMINOUS MATTER
PARTICLE MODELS
PARTICLES
PHOTONS
POSTULATED PARTICLES
QUARKONIUM
RADIATIONS
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
UNIFIED GAUGE MODELS
UPSILON-9460 MESONS
VECTOR MESONS