Towards an effective-action approach to fermion-loop corrections
High Energy Physics - Phenomenology
2009-11-10 v2
Abstract
We present a study of the effective action approach to incorporate higher-order effects in e^+e^- -> n fermions. In its minimal version, the effective action approach is found to exhibit problems with unitarity and high-energy behaviour. We identify the origin of these problems by investigating the zero-mode solutions of the Ward Identities. A numerical analysis of the importance of the zero-mode solutions is presented for four-fermion production processes.
Cite
@article{arxiv.hep-ph/0303105,
title = {Towards an effective-action approach to fermion-loop corrections},
author = {W. Beenakker and A. P. Chapovsky and A. Kanaki and C. G. Papadopoulos and R. Pittau},
journal= {arXiv preprint arXiv:hep-ph/0303105},
year = {2009}
}
Comments
43 pages, 1 figure. Accepted for publication in Nuclear Physics B