paper

BPS ansatzes as electric form-factors

arXiv:0812.5080

Abstract

We argue that BPS ansatzes, entering manifestly vacuum BPS monopole solutions to equations of motion in the (Minkowskian) non-Abelian Higgs model play the role of some electric form-factors and that this implies (soft) violating the CP-invariance of the mentioned model, similar to taking place in the Euclidian Yang-Mills (YM) theory with instantons, generating the -term in the appropriate effective Hamiltonian.

v5. Discussion about magnons, topologically trivial purely magnetic vacuum configurations, is added

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