ASTROPHYSICAL CONSTRAINTS ON MASSIVE UNSTABLE NEUTRAL RELIC PARTICLES Academic Article

abstract

• There has recently been renewed interest in massive neutral dark-matter particle candidates with masses greater than 1 TeV which may be unstable. We re-evaluate the constraints on such particles from the possible effects of their decays on the spectrum of the microwave background-radiation and the primordially synthesised abundances of the light elements, from observations of the diffuse gamma-ray background radiation, and from searches for muons and neutrinos in nucleon-decay and cosmic-ray detectors. We find that such unstable neutral relics may well have the cosmological critical density if their lifetime exceeds 1016 yr. We illustrate our arguments by applying them to technicolour baryons and to "cryptons" in superstring-inspired models. 1992.

authors

• Sarkar, Sayantan

published proceedings

• NUCLEAR PHYSICS B

author list (cited authors)

• ELLIS, J., GELMINI, G. B., LOPEZ, J. L., NANOPOULOS, D. V., & SARKAR, S.

citation count

• 328

complete list of authors

• ELLIS, J||GELMINI, GB||LOPEZ, JL||NANOPOULOS, DV||SARKAR, S

publication date

• April 1992

publisher

• Elsevier  Publisher

published in

• Nuclear Physics B  Journal

keywords

• 51 Physical Sciences
• 5106 Nuclear And Plasma Physics
• 5107 Particle And High Energy Physics

Digital Object Identifier (DOI)

• 10.1016/0550-3213(92)90438-H

URI

• https://hdl.handle.net/1969.1/182914

start page

• 399

end page

• 437

volume

• 373

issue

• 2

URL

• http://dx.doi.org/10.1016/0550-3213(92)90438-h