Towards systematic near-threshold calculations in perturbative QFT
High Energy Physics - Phenomenology
2009-10-30 v3 High Energy Physics - Theory
Mathematical Physics
math.MP
Abstract
For any near-threshold asymptotic regime and for any Feynman diagram (involving loop and/or phase space integrals), a systematic prescription for explicitly constructing all-logs, all-powers (all-twists) expansions in perfectly factorized form with explicit integrals for coefficients, is presented. The distribution-theoretic nature of the method of asymptotic operation employed allows treatment of totally exclusive phase space in the same manner as loop integrals.
Cite
@article{arxiv.hep-ph/9703424,
title = {Towards systematic near-threshold calculations in perturbative QFT},
author = {Fyodor V. Tkachov},
journal= {arXiv preprint arXiv:hep-ph/9703424},
year = {2009}
}
Comments
8 PS; 04.06.97: added universal definition of the scaling exponent n_kappa + misprints corrected; 07.11.98: maintenance