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Q-ball Instability due to U(1) Breaking
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abstract
Q-ball is a non-topological soliton whose stability is ensured by global U(1) symmetry. We study a Q-ball which arises in the Affleck-Dine mechanism for baryogenesis and consider its possible instability due to U(1) breaking term ($A$-term) indispensable for successful baryogenesis. It is found that the instability destroys the Q-ball if its growth rate exceeds inverse of the typical relaxation time scale of the Q-ball. However, the instability is not so strong as it obstructs the cosmological formation of the Q-balls.
Forward citations
Cited by 2 Pith papers
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Q-balls Under Spontaneously Broken U(1) Symmetry
Q-balls under spontaneously broken U(1) can leak charge through the Nambu-Goldstone channel and end as smaller Q-balls, oscillons, or decaying configurations, with stable remnants for small symmetry-breaking scales.
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Non-topological solitons and quasi-solitons
A comprehensive review of non-topological solitons (Q-balls) and quasi-solitons (oscillons), their properties, dynamics, and roles in early-universe physics.
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