Remarks on fermion-number violation and premature unitarization in high-energy instanton-induced scattering

Michele Maggiore, Mikhail Shifman

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Abstract

We critically discuss recent works in which the premature unitarization mechanism is studied with the inclusion of non-nearest-neighbor interactions or beyond leading order in the energy. We also point out that the nonperturbative valley method gives inconsistent results when applied to fermion-number- violating amplitudes, and we argue that, independently of the mechanism of premature unitarization, the nonperturbative amplitudes which violate the fermion number are always exponentially suppressed.

Original languageEnglish (US)
Pages (from-to)3610-3618
Number of pages9
JournalPhysical Review D
Volume47
Issue number8
DOIs
StatePublished - 1993

Bibliographical note

Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.

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