Measurement of the W + Jet Cross Section at CDF

TL;DR

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

Contribution

First detailed measurement of W+jets cross sections at Tevatron across multiple jet multiplicities with differential distributions.

Findings

Measured cross sections for W+1 to W+4 jets.

Compared data with Monte Carlo simulations showing agreement.

Provided invariant mass and angular separation distributions for W+>=2 jets.

Abstract

A measurement of W->e nu + n-jet cross sections in ppbar collisions at sqrt(s)=1.96 TeV using the Collider Detector at Fermilab in Run II is presented. The measurement is based on an integrated luminosity of 320 pb-1, and includes events with jet multiplicity from >= 1 to >= 4. In each jet multiplicity sample the differential and cumulative cross sections with respect to the transverse energy of the n^(th)-leading jet are measured. For W+>=2 jets the differential cross section with respect to the 2-leading jets invariant mass m_(j_(1)j_(2)) and angular separation Delta R_(j_(1)j_(2)) is also reported. The data are compared to predictions from Monte Carlo simulations.