Fermions, Anomaly and Unitarity in High-Energy Electroweak Scattering

Details Fermions, Anomaly and Unitarity in High-Energy Electroweak Scattering Fermions, Anomaly and Unitarity in High-Energy Electroweak Scattering

1993-11-03

arxiv.org/abs/hep-ph/9311219v1

Int.J.Mod.Phys.A9:795-860,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

59 (Latex) pages (+13 postscript figures (1075 blocks) available by e-mail request), GEF-Th-17/1993

Scientific paper

10.1142/S0217751X94000376

We report the "state of the art" of the problem of $B+L$ violation in high-energy electroweak scatterings. Results of various analyses point toward (though do not prove rigorously yet) the "half-suppression", i.e., that the $B+L$ violating cross section remains suppressed at least by the negative exponent of the single instanton action, at all energies. Most interesting techniques developed in this field are reviewed. Particular attention is paid to unitarity constraints on the anomalous cross section, and to some conceptual problem involving the use of the optical theorem in the presence of instantons.

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