Free Meson Seminars
Hunting renormalons
by Prof. Gunnar Bali (University of Regensburg)
Monday, February 23, 2015
from
to
(Asia/Kolkata)
at A304
at A304
Description |
The operator product expansion (OPE) is an important concept in particle physics and beyond. Within this framework physical observables can be expressed as a sum of expectation values of local operators encoding long distance physics, accompanied by short distance Wilson coefficients that can, e.g., be computed in perturbation theory. The general mathematical structure is that of a trans-series. I expand two such Wilson coefficients in four-dimensional N=3 non-SUSY Yang-Mills theory (gluodynamics) up to O(g70) in the coupling constant and confront the result with theoretical expectations on the asymptotic behaviour. |