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| HAL : hal-00009613, version 6 |
| arXiv : hep-ph/0510078 |
| Fiche détaillée |  Récupérer au format |
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| Versions disponibles : | v1 (06-10-2005) | v2 (20-11-2005) | v3 (12-01-2006) | v4 (24-01-2006) | v5 (27-03-2006) | v6 (04-07-2006) |
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| Particle production from Q-balls |
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| Stephen Clark 1 |
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| (06/10/2005) |
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| 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. |
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| 1 : | Institut de théorie des phénomènes physiques (ITP/LPPC) |
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École Polytechnique Fédérale de Lausanne |
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| Domaine | : | Physique/Physique des Hautes Energies - Phénoménologie |
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| hal-00009613, version 6 | |
| http://hal.archives-ouvertes.fr/hal-00009613 | |
| oai:hal.archives-ouvertes.fr:hal-00009613 | |
| Contributeur : Stephen Clark | |
| Soumis le : Mardi 4 Juillet 2006, 12:28:17 | |
| Dernière modification le : Mardi 4 Juillet 2006, 13:30:28 | |
