We present a global fit to HERA data on the reduced cross section measured in electron-proton collisions in the region of small Bjorken-x: x≤x0=10−2 and moderate to high values of the virtuality Q2<Qmax2=650 GeV2. The main dynamical ingredients in the fits are two recently proposed improved BK equations for the description of the small-x evolution of the dipole scattering amplitude. These two new equations provide an all-order resummation of double collinear logarithms that arise beyond leading logarithmic accuracy. We show that a very good description of data is possible in both cases, provided the parent dipole or smallest dipole prescriptions are employed for the running of the coupling.
@article{arxiv.1507.07120,
title = {Resummation of double collinear logs in BK evolution versus HERA data},
author = {Javier L. Albacete},
journal= {arXiv preprint arXiv:1507.07120},
year = {2015}
}