Precision electroweak calculation of the production of a high transverse-momentum lepton pair at hadron colliders

TL;DR

This paper provides a comprehensive electroweak correction calculation for high transverse-momentum lepton pair production at hadron colliders, including photon emission effects and photon-induced processes, implemented in the HORACE event generator.

Contribution

It introduces a precise calculation method for electroweak corrections in lepton pair production, incorporating multiple photon emissions and photon-induced subprocesses, integrated into the HORACE generator.

Findings

Electroweak corrections significantly affect observables at Tevatron and LHC.

Photon-induced subprocesses impact the production rates.

The new implementation improves simulation accuracy for Drell-Yan processes.

Abstract

We present a detailed study of the production of a high transverse-momentum lepton pair at hadron colliders, which includes the exact O(alpha) electroweak corrections properly matched with leading logarithmic effects due to multiple photon emission, as required by the experiments at the Fermilab Tevatron and the CERN LHC. Numerical results for the relevant observables of single Z-boson production at hadron colliders are presented. The impact of the radiative corrections is discussed in detail. The presence in the proton of a photon density is considered and the effects of the photon-induced partonic subprocesses are analyzed. The calculation has been implemented in the new version of the event generator HORACE, which is available for precision simulations of the neutral and charged current Drell-Yan processes.