Evolution of the color dipole cross section

Abstract

Using Laplace transform techniques, we describe the evolution of the color dipole cross section, at the leading-order and next-to-leading order approximations, from the Bartels-Golec-Biernat-Kowalski model in a kinematical region of low values of the Bjorken variable $x$ and a wide range of transverse dipole size $r$. This evolution method shows that the saturation scale and geometric scaling are retained. We derived analytical results for the integrated and unintegrated color dipole gluon distribution functions and compared them with the CJ15 parametrization group and the unintegrated color dipole gluon distribution models respectively. The Sudakov form factor into the evolution of the unintegrated color dipole gluon distribution is incorporated and the results are considered at small and large values of $k_{t}^{2}$