The fate of small classically stable Q-balls

A bstract The smallest classically stable Q-balls are, in fact, generically metastable: in quantum theory they decay into free particles via collective tunneling. We derive general semiclassical method to calculate the rate of this process in the entire kinematical region of Q-ball metastability. Ou...

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Bibliographic Details
Published in:The journal of high energy physics 2017-12, Vol.2017 (12), p.1-28, Article 131
Main Authors: Levkov, Dmitry, Nugaev, Emin, Popescu, Andrei
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Cosmology of Theories beyond the SM
Decay rate
Elementary Particles
High energy physics
Mathematical models
Nonperturbative Effects
Particle decay
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quantum theory
Regular Article - Theoretical Physics
Relativity Theory
Solitons Monopoles and Instantons
String Theory
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Summary:A bstract The smallest classically stable Q-balls are, in fact, generically metastable: in quantum theory they decay into free particles via collective tunneling. We derive general semiclassical method to calculate the rate of this process in the entire kinematical region of Q-ball metastability. Our method uses Euclidean field-theoretical solutions resembling the Coleman’s bounce and fluctuations around them. As an application of the method, we numerically compute the decay rate to the leading semiclassical order in a particular one-field model. We shortly discuss cosmological implications of metastable Q-balls.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP12(2017)131