Classical behaviour of Q-balls in the Wick-Cutkosky model

Abstract

In this paper, we continue discussing Q-balls in the Wick--Cutkosky model. Despite Q-balls in this model are composed of two scalar fields, they turn out to be very useful and illustrative for examining various important properties of Q-balls. In particular, in the present paper we study in detail (analytically and numerically) the problem of classical stability of Q-balls, including the nonlinear evolution of classically unstable Q-balls, as well as the behaviour of Q-balls in external fields in the non-relativistic limit.

21 pages, 12 figures, LaTeX; v2: section 3.3 slightly enlarged, typos corrected, minor changes in the text

References in corpus (5)

• Axion dark matter, solitons, and the cusp-core problem
• Relativistic axions from collapsing Bose stars
• Solving puzzles of GW150914 by primordial black holes
• Problem with classical stability of U(1) gauged Q-balls
• Q-balls with scalar charges

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