Radiative corrections and instability of large Q-Balls

Abstract

We discuss stability of Q-balls interacting with fermions in theory with small coupling constant g. We argue that for configurations with large global U(1)-charge Q the problem of classical stability becomes more subtle. For example, in model with flat direction there is maximal value of charge for stable solutions with Q~1/g^4. We study origin of additional instability and discuss possible ways to avoid it.

17 pages, 10 figures, referneces added, minor changes in the text

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Cited by in corpus (2)

• Review of non-topological solitons in theories with $U(1)$-symmetry
• Scattering of fermions on a one-dimensional Q-ball