${\gamma }^{\ast }{\gamma }^{\ast }$ Cross Section at NLO and Properties of the BFKL Evolution at Higher Orders

Giovanni A. Chirilli, Yuri V. Kovchegov

We obtain a simple analytic expression for the high energy ${\gamma }^{\ast }{\gamma }^{\ast }$ scattering cross section at the next-to-leading order in the logarithms-of-energy power counting. To this end w…