Unitarity-Cuts, Stokes' Theorem and Berry's Phase

Details Unitarity-Cuts, Stokes' Theorem and Berry's Phase Unitarity-Cuts, Stokes' Theorem and Berry's Phase

2010-01-18

arxiv.org/abs/1001.3156v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

presented at RADCOR 2009 - 9th International Symposium on Radiative Corrections, October 25 - 30 2009, Ascona, Switzerland

Scientific paper

Two-particle unitarity-cuts of scattering amplitudes can be efficiently
computed by applying Stokes' Theorem, in the fashion of the Generalised Cauchy
Theorem. Consequently, the Optical Theorem can be related to the Berry Phase,
showing how the imaginary part of arbitrary one-loop Feynman amplitudes can be
interpreted as the flux of a complex 2-form.

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