TTP10-50 Geometric approach to asymptotic expansion of Feynman integrals

TTP10-50 Geometric approach to asymptotic expansion of Feynman integrals

TTP10-50 Geometric approach to asymptotic expansion of Feynman integrals

We present an algorithm that reveals relevant contributions in non-threshold-type asymptotic expansion of Feynman integrals about a small parameter. It is shown that the problem reduces to finding a convex hull of a set of points in a multidimensional vector space.

Alexey Pak, Alexander Smirnov
Eur.Phys.J. C71 1626 2011
PDF PostScript arXiv