Speaker
Renaud Boussarie
(CPHT, CNRS, Ecole polytechnique, IP Paris)
Description
The Balitsky-Kovchegov evolution equation, which governs QCD processes at high energy and can account for gluonic saturation effects in this limit, suffers from the presence of large collinear logarithms that make the perturbative expansion unstable. We develop a systematic framework to deal with such logarithms in terms of a scheme transformation within the standard high energy Operator Product Expansion. The resulting NLL BK equation is free from collinear double logarithms and numerically more stable. We will also discuss how other solutions developed in an ad-hoc fashion can be recovered with our framework, and how to deal with single logarithms in a similar manner.