A complete NLL BFKL calculation of Mueller Navelet jets at LHC

TL;DR

This paper presents a comprehensive next-to-leading order BFKL calculation of Mueller Navelet jets at the LHC, revealing that BFKL and DGLAP predictions are surprisingly similar, challenging previous assumptions about their distinguishability.

Contribution

It provides the first complete NLL BFKL analysis of Mueller Navelet jets, including both Green's function and vertex corrections, and compares results with DGLAP predictions.

Findings

Both NLL corrections significantly impact observables.

NLL BFKL results are similar to NLL DGLAP predictions.

Challenges the idea that Mueller Navelet jets can distinguish BFKL from DGLAP.

Abstract

For the first time, a next-to-leading BFKL study of the cross section and azimuthal decorrellation of Mueller Navelet jets is performed, i.e. including next-to-leading corrections to the Green's function as well as next-to-leading corrections to the Mueller Navelet vertices. The obtained results for standard observables proposed for studies of Mueller Navelet jets show that both sources of corrections are of equal and big importance for final magnitude and final behavior of observables, in particular for the LHC kinematics investigated here in detail. The astonishing conclusion of our analysis is that the observables obtained within the complete next-lo-leading order BFKL framework of the present paper are quite similar to the same observables obtained within next-to-leading logarithm DGLAP type treatment. This fact sheds doubts on general belief that the studies of Mueller Navelet jets at the LHC will lead to clear discrimination between the BFKL and the DGLAP dynamics.