Massive particles and unitarity cuts
High Energy Physics - Phenomenology
2012-02-14 v1
Abstract
We present an extension of the spinor integration formalism of one loop amplitudes from the double-cut to the single-cut case. This technique can be applied for the computation of the tadpole coefficients. Moreover we describe an off-shell continuation of one loop amplitudes that allows a finite evaluation of the unitarity cuts in the channel of a single massive external fermion.
Cite
@article{arxiv.1202.2426,
title = {Massive particles and unitarity cuts},
author = {Ruth Britto and Edoardo Mirabella},
journal= {arXiv preprint arXiv:1202.2426},
year = {2012}
}
Comments
To appear in the proceedings of the LCWS 2011, September 2011, Granada, Spain