Radiative corrections and instability of large Q-Balls

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...

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Bibliographic Details
Published in:arXiv.org 2017-11
Main Authors: Kovtun, A V, E Ya Nugaev
Format: Article
Language:English
Subjects:
Fermions
Stability
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1612.00700