5 years ago

The fate of small classically stable Q-balls.

Emin Nugaev, Andrei Popescu, Dmitry Levkov

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.

Publisher URL: http://arxiv.org/abs/1711.05279

DOI: arXiv:1711.05279v1

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