Applications of Lipatov's high energy effective action to NLO BFKL jet phenomenology

TL;DR

This paper advances the calculation of NLO QCD observables in high energy physics using Lipatov's effective action, specifically focusing on jet vertices and impact factors relevant for BFKL phenomenology.

Contribution

It introduces a new regularization and subtraction method for NLO corrections and provides the first calculation of the real part of the Mueller-Tang impact factor.

Findings

Calculated real and virtual NLO corrections to the forward jet vertex.

Determined the real part of the NLO Mueller-Tang impact factor.

Progress towards a complete NLO BFKL description of dijet events.

Abstract

We report on recent progress in the evaluation of next-to-leading order (NLO) observables using Lipatov's QCD high energy effective action. We calculate both real and virtual corrections to the quark induced forward jet vertex at NLO, making use of a new regularization method and a subtraction mechanism. As a new result we determine the real part of the NLO Mueller-Tang impact factor which is the only missing element for a complete NLO BFKL description of dijet events with a rapidity gap.