Radiative Decay of a Long-Lived Particle and Big-Bang Nucleosynthesis

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dc.creatorHoltmann, Erich
dc.creatorKawasaki, M.
dc.creatorKohri, K.
dc.creatorMoroi, Takeo
dc.date1998-05-20
dc.date2005-08-12
dc.date.accessioned2026-07-07T11:35:29Z
dc.date.available2026-07-07T11:35:29Z
dc.descriptionThe effects of radiatively decaying, long-lived particles on big-bang nucleosynthesis (BBN) are discussed. If high-energy photons are emitted after BBN, they may change the abundances of the light elements through photodissociation processes, which may result in a significant discrepancy between the BBN theory and observation. We calculate the abundances of the light elements, including the effects of photodissociation induced by a radiatively decaying particle, but neglecting the hadronic branching ratio. Using these calculated abundances, we derive a constraint on such particles by comparing our theoretical results with observations. Taking into account the recent controversies regarding the observations of the light-element abundances, we derive constraints for various combinations of the measurements. We also discuss several models which predict such radiatively decaying particles, and we derive constraints on such models.
dc.descriptionPublished version in Phys. Rev. D. Typos in figure captions corrected
dc.identifierhttps://arxiv.org/abs/hep-ph/9805405
dc.identifierhttp://arxiv.org/abs/hep-ph/9805405
dc.identifierPhys.Rev.D60:023506,1999
dc.identifierdoi:10.1103/PhysRevD.60.023506
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/198607
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleRadiative Decay of a Long-Lived Particle and Big-Bang Nucleosynthesis
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