QCD traveling waves phenomenology revisited

Abstract

In this paper we review and update the Amaral-Gay Ducati-Betemps-Soyez saturation model, by testing it against the recent H1-ZEUS combined data on deep inelastic scattering, including heavy quarks in the dipole amplitude. We obtain that this model, which is based on traveling wave solutions of the Balitsky-Kovchegov equation and built in the momentum space framework, yields very accurate descriptions of the reduced cross section, ${\sigma }_r(x,y,Q^2)$, as well as DIS structure functions such as $F_2(x,Q^2)$ and $F_L(x,Q^2)$, all measured at HERA. Additionally, it provides good descriptions of heavy quark structure functions, $F_2^{cc}$ and $F_2^{bb}$ at small-$x$ and $Q^2\lesssim 60$ GeV${}^2$. We also use the improved model to make predictions for structure functions to be measured in the near future at LHeC.

Comments: 13 pages, 7 figures