NLO Vertex for a Forward Jet plus a Rapidity Gap at High Energies

TL;DR

This paper calculates the NLO forward jet vertex associated with rapidity gaps within the BFKL formalism, enabling more precise studies of diffractive jet production at high energies.

Contribution

It provides the first NLO calculation of the forward jet vertex with rapidity gaps using Lipatov's effective action, advancing theoretical understanding of diffractive processes.

Findings

NLO jet vertex is finite within collinear factorization.

Enables NLO analysis of jet production in diffractive events.

Facilitates more accurate predictions for Mueller-Tang dijets.

Abstract

We present the calculation of the forward jet vertex associated to a rapidity gap (coupling of a hard pomeron to the jet) in the BFKL formalism at next-to-leading order (NLO). Real emission contributions are computed via Lipatov's effective action. The NLO jet vertex turns out to be finite within collinear factorization and allows, together with the NLO non-forward gluon Green's function, to perform NLO studies of jet production in diffractive events (e.g. Mueller-Tang dijets).