Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-05-02
Phys.Lett. B513 (2001) 112-118
Physics
High Energy Physics
High Energy Physics - Theory
6 pages, 2 figures, uses RevTex4; v2: replaced figures
Scientific paper
10.1016/S0370-2693(01)00669-4
We extend calculational techniques for static solitons to the case of field configurations with simple time dependence in order to consider quantum effects on the stability of Q-balls. These nontopological solitons exist classically for any fixed value of an unbroken global charge Q. We show that one-loop quantum effects can destabilize very small Q-balls. We show how the properties of the soliton are reflected in the associated scattering problem, and find that a good approximation to the full one-loop quantum energy of a Q-ball is given by $\omega - E_0$, where $\omega$ is the frequency of the classical soliton's time dependence, and $E_0$ is the energy of the lowest bound state in the associated scattering problem.
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