Drell-Yan lepton pair production at high energies in the Parton Reggeization Approach

TL;DR

This paper extends the Parton Reggeization Approach to Drell-Yan lepton pair production, providing theoretical predictions that agree well with experimental data across various energies and kinematic ranges.

Contribution

It introduces a Reggeized quark-antiquark annihilation process for Drell-Yan production within the Reggeization framework, enhancing the theoretical description of high-energy lepton pair production.

Findings

Good agreement with experimental transverse-momentum and invariant-mass distributions.

Predictions for Drell-Yan production at future LHC experiments.

Validation of the Reggeization approach in describing angular distributions.

Abstract

According to extensive theoretical studies of the high energy limit of QCD, inelastic interactions are dominated by the multi-Regge final states. The appropriate gauge-invariant objects, which simultaneously incorporate the transverse momentum degrees of freedom, are Reggeized gluons, quarks and antiquarks. In the present communication we extend parton Reggeization approach to Drell-Yan production of massive lepton pairs. The basic ingredient is a process of Reggeized quark-antiquark annihilation, which is described by the Reggeon-Reggeon-photon effective vertex. We calculate transverse-momentum and invariant-mass distributions of Drell-Yan lepton pairs measured at the CERN SPS, FNAL Tevatron and CERN LHC in the different ranges of energy and rapidity. We focus on angular distributions of Drell-Yan leptons in different kinematical ranges. The obtained results are compared with the existing data and a good agreement is found. The predictions for future experiments for Drell-Yan lepton pair production at the CERN LHC have been made.