Cosmological evolution of generic early-decaying particles and their daughters

Details Cosmological evolution of generic early-decaying particles and their daughters Cosmological evolution of generic early-decaying particles and their daughters

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993nuphb.402..323h&link_type=abstract

Nuclear Physics B, Volume 402, Issue 1-2, p. 323-348.

Physics

Nuclear Physics

5

Scientific paper

We have derived a set of simplified Boltzmann equations to study the cosmological evolution of early-decaying particles, as well as of their decay products, with particular emphasis on decays which occur when the decaying particles are relativistic. Inverse decay and time dilation are explicitly included in the Boltzmann equations. In addition, the evolution of the effective number of neutrino species (Nν) due to the decay has been calculated as a function of the properties of the early-decaying particles.

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