On the application of Z^0+jet events for determining the gluon distribution in a proton at the LHC

TL;DR

This paper proposes using Z^0+jet events at the LHC to accurately measure the gluon distribution within protons across a broad range of momentum fractions and energy scales, with methods to suppress background noise.

Contribution

It demonstrates that Z^0+jet events can be effectively used to determine the gluon distribution in protons at high energies, with specific selection criteria to reduce background events.

Findings

Sufficient statistics for gluon distribution measurement at LHC with 20 fb^{-1}

Effective background suppression techniques demonstrated

Gluon distribution accessible over a wide x and Q^2 range

Abstract

It is shown that the samples of Z0+jet events, collected at the LHC with the integrated luminosity L_{int}=20 fb^{-1}, may have enough statistics for determining the gluon distribution inside a proton in the region of 2*10^{-4} < x < 1.0 at Q^2 values in the interval of 0.9*10^3 < Q^2 < 4*10^4 ~(GeV/c)^2. A possibility of the background events suppression by use of the Z^0+jet events selection criteria is also demonstrated.