Entropy production by Q-ball decay for diluting long-lived charged particles

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dc.creatorKasuya, Shinta
dc.creatorTakahashi, Fuminobu
dc.date2007-09-17
dc.date.accessioned2026-07-07T11:53:09Z
dc.date.available2026-07-07T11:53:09Z
dc.descriptionThe cosmic abundance of a long-lived charged particle such as a stau is tightly constrained by the catalyzed big bang nucleosynthesis. One of the ways to evade the constraints is to dilute those particles by a huge entropy production. We evaluate the dilution factor in a case that non-relativistic matter dominates the energy density of the universe and decays with large entropy production. We find that large Q balls can do the job, which is naturally produced in the gauge-mediated supersymmetry breaking scenario.
dc.description8 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/0709.2634
dc.identifierhttp://arxiv.org/abs/0709.2634
dc.identifierJCAP0711:019,2007
dc.identifierdoi:10.1088/1475-7516/2007/11/019
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204439
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleEntropy production by Q-ball decay for diluting long-lived charged particles
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