Dijet Production at Hadron--Hadron Colliders in the BFKL Approach

TL;DR

The paper addresses dijet production at hadron colliders using BFKL resummation for large rapidity separations. It develops an iterated, event-generator implementation of the BFKL solution, incorporating subleading effects such as running coupling and phase-space constraints. This approach reduces the discrepancy between BFKL predictions and Tevatron data on azimuthal decorrelation and provides a framework for more realistic simulations. The work highlights the importance of subleading corrections in two-scale QCD processes and sets the stage for extended phenomenology at hadron and lepton colliders.

Abstract

The production in high-energy hadron collisions of a pair of jets with large rapidity separation is studied in an improved BFKL formalism. By recasting the analytic solution of the BFKL equation as an explicit order-by-order sum over emitted gluons, the effects of phase space constraints and the running coupling are studied. Particular attention is paid to the azimuthal angle decorrelation of the jet pair. The inclusion of sub-leading effects significantly improves the agreement between the theoretical predictions and recent preliminary measurements from the Dzero collaboration.