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http://acervodigital.unesp.br/handle/11449/23532
- Title:
- Instant preheating mechanism and ultrahigh energy cosmic rays
- Universidade de São Paulo (USP)
- Conselho Nacl Pesquisa Desenvolvimento COCEX
- Universidade Estadual Paulista (UNESP)
- 0556-2821
- 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.
- 1-Jul-2004
- Physical Review D. College Pk: American Physical Soc, v. 70, n. 2, 7 p., 2004.
- 7
- American Physical Soc
- http://dx.doi.org/10.1103/PhysRevD.70.023003
- http://hdl.handle.net/11449/23532
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/23532
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