Effects of heavy quarks in the dipole cross section with the KLN model

TL;DR

This paper investigates how heavy quark masses affect the dipole cross-section in the KLN model, highlighting potential observable effects at future colliders like LHeC and EIC.

Contribution

It introduces the consideration of heavy quark masses in the Bjorken variable within the KLN model, enhancing understanding of saturation effects at low x.

Findings

Heavy quark masses influence the dipole cross-section at low x.

Non-linear saturation effects are significant at $Q^2<Q_s^2$.

Observable effects are predicted for future colliders like LHeC and EIC.

Abstract

The dipole cross-section behavior for protons and nuclei is analyzed with and without considering the heavy quark masses in the Bjorken variable $x$ using the Kharzeev-Levin-Nardi (KLN) model of low $x$ gluon distributions. The Color Glass Condensate (CGC) effects in the color dipole model are influenced by the heavy quark masses in the Bjorken variable $x$ at $Q^2<Q_{s}^2$. These non-linear saturation effects will be observable in the LHeC and EIC at very small $x$ values.