Biased discrete symmetry and domain wall problem

Details Biased discrete symmetry and domain wall problem Biased discrete symmetry and domain wall problem

1994-11-24

arxiv.org/abs/hep-ph/9411387v1

Phys.Lett. B352 (1995) 214-219

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, latex, no figures

Scientific paper

10.1016/0370-2693(95)00511-I

We reconsider a cosmological evolution of domain walls produced by spontaneous breaking of an approxime discrete symmetry. We show, that domain walls may never collapse even if the standard bound on the vacuum energy asymmetry is satisfied. Instead of disappearing, these defects may form stable ``bound states'' - double wall systems. Possible stability of such a wall is a dynamical question and consequently restricts the allowed range of parameters. In particular, in the two Higgs doublet standard model with an anomalous Z(2) symmetry, the above restriction suggests the mass of the pseudoscalar Higgs (would be axion) being close to the mass of the scalar one.

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