W + Jet Production at CDF

TL;DR

This paper reports measurements of W boson production with jets at the Tevatron, analyzing cross sections for various jet multiplicities and comparing results to Monte Carlo predictions to test QCD models.

Contribution

First detailed measurement of W+jets cross sections at 1.96 TeV with multiple jet multiplicities and kinematic variables, compared to theoretical simulations.

Findings

Measured differential cross sections for W+jets up to 4 jets.

Compared data with Monte Carlo predictions to validate QCD models.

Provided new insights into jet kinematics in W boson events.

Abstract

The cross section for the inclusive production of W bosons in association with jets in ppbar collisions at sqrt(s)=1.96 TeV using the Collider Detector at Fermilab (CDF II) is presented. The measurement is based on an integrated luminosity of 320pb^-1, and includes events with up to 4 or more jets. In each jet multiplicity sample the differential and cumulative cross sections with respect to the transverse energy of the i^th-jet are measured. For W+>=2 jets the differential cross section with respect to the 2-leading jets invariant mass m_j1j2 and angular separation Delta R_j1j2 is also reported. The data are compared to predictions from Monte Carlo simulations.