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arXiv · hep-ph/9908446

Analytical and numerical properties of Q-balls

Tuomas Multamaki·Iiro Vilja
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Abstract

Stable non-topological solitons, Q-balls, are studied using analytical and numerical methods. Three different physically interesting potentials that support Q-ball solutions are considered: two typical polynomial potentials and a logarithmic potential inspired by supersymmetry. It is shown that Q-balls in these potentials exhibit different properties in the thick-wall limit where the charge of a Q-ball is typically considerably smaller than in the thin-wall limit. Analytical criteria are derived to check whether stable Q-balls exists in the thick-wall limit for typical potentials. Q-ball charge, energy and profiles are presented for each potential studied. Evaporation rates are calculated in the perfect thin-wall limit and for realistic Q-ball profiles. It is shown that in each case the evaporation rate increases with decreasing charge.

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Tuomas Multamaki, Iiro Vilja. 1999-08-24. Analytical and numerical properties of Q-balls. https://doi.org/10.1016/s0550-3213(99)00827-5

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