Hadroproduction of electroweak gauge boson plus jets and TMD parton density functions

TL;DR

This paper introduces a method for modeling electroweak gauge boson plus jets production at the LHC using TMD factorization, incorporating experimental data and uncertainties to improve predictions of transverse momentum effects.

Contribution

It presents a novel approach combining TMD factorization with experimental DIS data to better simulate electroweak boson plus jets processes at high energy colliders.

Findings

Successful implementation of TMD-based predictions for W+jets production

Improved modeling of azimuthal correlations and jet distributions

Quantification of uncertainties in TMD parton densities

Abstract

If studies of electroweak gauge boson final states at the Large Hadron Collider, for Standard Model physics and beyond, are sensitive to effects of the initial state's transverse momentum distribution, appropriate generalizations of QCD shower evolution are required. We propose a method to do this based on QCD transverse momentum dependent (TMD) factorization at high energy. The method incorporates experimental information from the high-precision deep inelastic scattering (DIS) measurements, and includes experimental and theoretical uncertainties on TMD parton density functions. We illustrate the approach presenting results for production of W-boson + n jets at the LHC, including azimuthal correlations and subleading jet distributions.