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2008-08-01 - Article/Dans un journal avec peer-review - Anglais - 16 page(s)

Brihaye Yves , Hartmann Betti, "Interacting Q-balls" in Nonlinearity, 21, 8, 1937-1952

  • Edition : Institute of Physics
  • Codes CREF : Physique des particules élémentaires (DI1221), Physique théorique et mathématique (DI1210)
  • Unités de recherche UMONS : Physique théorique et mathématique (S814)
Texte intégral :

Abstract(s) :

(Anglais) We study non-topological solitons, so-called Q-balls, which carry a non-vanishing Noether charge and arise as lump solutions of self-interacting complex scalar field models. Explicit examples of new axially symmetric non-spinning Q-ball solutions that have not been studied so far are constructed numerically. These solutions can be interpreted as angular excitations of the fundamental Q-balls and are related to the spherical harmonics. Correspondingly, they have higher energy and their energy densities possess two local maxima on the positive z-axis. We also study two Q-balls interacting via a potential term in 3 + 1 dimensions and construct examples of stationary, solitonic-like objects in (3 + 1)-dimensional flat space–time that consist of two interacting global scalar fields. We concentrate on configurations composed of one spinning and one non-spinning Q-ball and study the parameter-dependence of the energy and charges of the configuration. In addition, we present numerical evidence that for fixed values of the coupling constants two different types of 2-Q-ball solutions exist: solutions with defined parity, but also solutions that are asymmetric with respect to reflection through the x–y plane.

Notes :
  • (Anglais) e-print: hep-th/0711.1969
Identifiants :
  • DOI : 10.1088/0951-7715/21/8/011