Lifetime of a massive particle in a de Sitter universe

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dc.creatorBros, Jacques
dc.creatorEpstein, Henri
dc.creatorMoschella, Ugo
dc.date2006-12-18
dc.date2007-11-19
dc.date.accessioned2026-07-07T11:23:26Z
dc.date.available2026-07-07T11:23:26Z
dc.descriptionWe study particle decay in de Sitter space-time as given by first order perturbation theory in an interacting quantum field theory. We show that for fields with masses above a critical mass $m_c$ there is no such thing as particle stability, so that decays forbidden in flat space-time do occur there. The lifetime of such a particle also turns out to be independent of its velocity when that lifetime is comparable with de Sitter radius. Particles with lower mass are even stranger: The masses of their decay products must obey quantification rules, and their lifetime is zero.
dc.description4 pages
dc.identifierhttps://arxiv.org/abs/hep-th/0612184
dc.identifierhttp://arxiv.org/abs/hep-th/0612184
dc.identifierJCAP0802:003,2008
dc.identifierdoi:10.1088/1475-7516/2008/02/003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194891
dc.subjectHigh Energy Physics - Theory
dc.titleLifetime of a massive particle in a de Sitter universe
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