What are universal features of gravitating Q-balls?

Abstract

We investigate how gravity affects Q-balls by exemplifying the case of the Affleck-Dine potential $V(\varphi ):=m^4\ln (1+\frac{{\varphi }^2}{m^2})$. Surprisingly, stable Q-balls with arbitrarily small charge exist, no matter how weak gravity is, contrary to the case of flat spacetime. We also show analytically that this feature holds true for general models as long as the leading order term of the potential is a positive mass term in its Maclaurin series.

8 pages, 10 figures, to appear in PRD

References in corpus (7)

• Gravitino dark matter from Q-ball decays
• Some stationary properties of a $Q$-ball in arbitrary space dimensions
• Stability of Q-balls and Catastrophe
• Q-balls in flat potentials
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Cited by in corpus (7)

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• RN-AdS Nontopoligical Solitons in Broken Einstein-Maxwell-Higgs Theory
• Soliton boson stars, Q-balls and the causal Buchdahl bound