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

Abstract

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.

8 pages, 1 figure

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Cited by in corpus (12)

• Big-Bang Nucleosynthesis and Gravitino
• Gravitino Dark Matter from Inflaton Decay
• Gravitational waves from the fragmentation of a supersymmetric condensate
• Supersymmetric Q-balls: A Numerical Study
• Spinning Supersymmetric Q-balls
• The Gravitino-Stau Scenario after Catalyzed BBN
• The ground states of baryoleptonic Q-balls in supersymmetric models
• Symmetry breaking in (gravitating) scalar field models describing interacting boson stars and Q-balls
• Flaxino dark matter and stau decay
• CBBN in the CMSSM
• The long-lived stau as a thermal relic
• Astrophage of neutron stars from supersymmetric dark matter Q-balls