Particle creation from \(Q\)-balls
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Publication:881732
DOI10.1016/J.NUCLPHYSB.2006.08.019zbMATH Open1215.81141arXivhep-ph/0510078OpenAlexW136672853MaRDI QIDQ881732
Author name not available (Why is that?)
Publication date: 16 May 2007
Published in: (Search for Journal in Brave)
Abstract: Non topological solitons, Q-balls can arise in many particle theories with U(1) global symmetries. As was shown by Cohen et al. cite{Qballscohen}, if the corresponding scalar field couples to massless fermions, large Q-balls are unstable and evaporate, producing a fermion flux proportional to the Q-ball's surface. In this paper we analyse Q-ball instabilities as a function of Q-ball size ans fermion mass. In particular, we construct an exact quantum-mechanical description of the evaporating Q-ball. This new construction provides an alternative method to compute Q-Ball's evaporation rates. We shall also find the new expression for the upper bound on evaporation as a function of the produced fermion mass and study the effects of Q ball's size on particle production.
Full work available at URL: https://arxiv.org/abs/hep-ph/0510078
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