Testing the parton evolution with the use of two-body final states

TL;DR

This paper explores how two-body final state measurements at the LHC can be used to map transverse momentum dependent parton densities, enhancing understanding of parton evolution.

Contribution

It introduces a method to reconstruct parton densities using distributions of transverse momentum and azimuthal angles in two-body final states at the LHC.

Findings

Distributions vary with invariant mass bins.

Reconstructed parton densities can reveal parton evolution.

Method applicable to LHC data analysis.

Abstract

We consider the production of $b\bar b$ quarks and Drell-Yan lepton pairs at LHC conditions focusing attention on the total transverse momentum of the produced pair and on the azimuthal angle between the momenta of the outgoing particles. Plotting the corresponding distributions in bins of the final state invariant mass, one can reconstruct the full map of the transverse momentum dependent parton densities in a proton. We give examples of how can these distributions can look like at the LHC energies.