Instant preheating mechanism and ultrahigh energy cosmic rays
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Data
2004-07-01
Autores
Campos, A. H.
Maia, JMF
Rosenfeld, R.
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American Physical Soc
Resumo
Top-down models assume that the still unexplained ultrahigh energy cosmic rays (UHECR's) are the decay products of superheavy particles. Such particles may have been produced by one of the post-inflationary reheating mechanisms and may account for a fraction of the cold dark matter. In this paper, we assess the phenomenological applicability of the simplest instant preheating framework not to describe a reheating process, but as a mechanism to generate relic supermassive particles as possible sources of UHECR's. We use cosmic ray flux and cold dark matter observational data to constrain the parameters of the model.
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Physical Review D. College Pk: American Physical Soc, v. 70, n. 2, 7 p., 2004.