Massless monopoles and the moduli space approximation

Details Massless monopoles and the moduli space approximation Massless monopoles and the moduli space approximation

2001-08-06

arxiv.org/abs/hep-th/0108029v1

Phys.Rev. D64 (2001) 125004

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 5 figures

Scientific paper

10.1103/PhysRevD.64.125004

We investigate the applicability of the moduli space approximation in theories with unbroken non-Abelian gauge symmetries. Such theories have massless magnetic monopoles that are manifested at the classical level as clouds of non-Abelian field surrounding one or more massive monopoles. Using an SO(5) example with one massive and one massless monopole, we compare the predictions of the moduli space approximation with the results of a numerical solution of the full field equations. We find that the two diverge when the cloud velocity becomes of order unity. After this time the cloud profile approximates a spherical wavefront moving at the speed of light. In the region well behind this wavefront the moduli space approximation continues to give a good approximation to the fields. We therefore expect it to provide a good description of the motion of the massive monopoles and of the transfer of energy between the massive and massless monopoles.

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