Electroweak instantons at non-zero Weinberg angle

Details Electroweak instantons at non-zero Weinberg angle Electroweak instantons at non-zero Weinberg angle

1995-01-10

arxiv.org/abs/hep-ph/9501253v1

Phys.Lett. B348 (1995) 149-154

Physics

High Energy Physics

High Energy Physics - Phenomenology

uuencoded postscript, 10 pages.

Scientific paper

10.1016/0370-2693(95)00126-6

Previous calculations of instanton effects in electroweak theory have concentrated on the case of zero Weinberg angle $\theta_w$, where the U(1) hypercharge field decouples. In this paper we extend the instanton calculation to non-zero $\theta_w$, by constructing a perturbation expansion. This allows for the first time the study of photon production at B and L number violating verticies. We find that the orientation of the instanton solution in isospin space has to be carefully considered to avoid unphysical results.

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