Conformal methods for massless Feynman integrals and large N_f methods
High Energy Physics - Theory
2013-09-02 v2
Abstract
We review the large N method of calculating high order information on the renormalization group functions in a quantum field theory which is based on conformal integration methods. As an example these techniques are applied to a typical graph contributing to the beta-function of O(N) phi^4 theory at O(1/N^2). The possible future directions for the large N methods are discussed in light of the development of more recent techniques such as the Laporta algorithm.
Cite
@article{arxiv.1301.7583,
title = {Conformal methods for massless Feynman integrals and large N_f methods},
author = {J. A. Gracey},
journal= {arXiv preprint arXiv:1301.7583},
year = {2013}
}
Comments
23 latex pages, uses svmult.cls and axodraw.sty, contribution to book "Computer Algebra in Quantum Field Theory: Integration, Summation and Special Functions"; several typos corrected in version 2