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

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

2007-09-17

arxiv.org/abs/0709.2634v1

JCAP0711:019,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 1 figure

Scientific paper

10.1088/1475-7516/2007/11/019

The 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.

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