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Cosmological constraints on the lifetime of massive particlesParticles with masses more than a few MeV, decaying into photons or electrons, can cause destruction by photofission of cosmologically produced light elements. A previous calculation of this effect is corrected and extended, and used to derive maximum lifetimes for massive neutrinos; these range from a few thousand seconds upward, depending on the particle mass. Some approximate expressions are given that enable lifetime limits to be obtained for other particles, with different masses and abundances, such as gravitinos. These limits are generally stronger than previously determined constraints, such as distortion of the microwave background by energetic photons.
Document ID
19850060842
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lindley, D.
(Fermi National Accelerator Laboratory Batavia, IL, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1985
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 294
ISSN: 0004-637X
Subject Category
Space Radiation
Accession Number
85A42993
Distribution Limits
Public
Copyright
Other

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