Bounds on direct couplings of superheavy metastable particles to the inflaton field from ultra high energy cosmic ray events
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Data
2002-10-30
Autores
Campos, A. H.
Lengruber, L. L.
Rosenfeld, Rogério [UNESP]
Reis, H. C.
Sato, R.
Título da Revista
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Editor
World Scientific Publ Co Pte Ltd
Resumo
Top-down models for the origin of ultra high energy cosmic rays (UHECR's) propose that these events are the decay products of relic superheavy metastable particles, usually called X particles. These particles can be produced in the reheating period following the inflationary epoch of the early Universe. We obtain constraints on some parameters such as the lifetime and direct couplings of the X-particle to the inflaton field from the requirement that they are responsible for the observed UHECR flux.
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Palavras-chave
high energy cosmic rays, inflation, reheating
Como citar
Modern Physics Letters A. Singapore: World Scientific Publ Co Pte Ltd, v. 17, n. 33, p. 2179-2188, 2002.