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Type: Artigo de periódico
Title: Bounds on direct couplings of superheavy metastable particles to the inflaton field from ultra high energy cosmic ray events
Author: Campos, AH
Lengruber, LL
Rosenfeld, R
Reis, HC
Sato, R
Abstract: 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.
Subject: high energy cosmic rays
Country: Singapura
Editor: World Scientific Publ Co Pte Ltd
Citation: Modern Physics Letters A. World Scientific Publ Co Pte Ltd, v. 17, n. 33, n. 2179, n. 2188, 2002.
Rights: fechado
Identifier DOI: 10.1142/S0217732302008915
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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