Further analysis of the BFKL equation with momentum cutoffs

Abstract

In this paper we investigate the effect of introducing transverse momentum cutoffs on the BFKL equation. We present solutions in moment space for various models of the BFKL kernel for different combinations of these cutoffs. We improve on previous calculations by using the full BFKL kernel (rather than simplified analytic approximations). The significance of the next-to-leading or “higher twist” terms in the kernel are assessed. We find that, while these terms are negligible in the absence of cutoffs, introducing an infrared (IR) cutoff markedly enhances their significance.