Abstract

A measurement of the differential cross sections for a W boson produced in association with jets in the muon decay channel is presented. The measurement is based on 13 TeV proton-proton collision data corresponding to an integrated luminosity of 2.2 inverse femtobarns, recorded by the CMS detector at the LHC. The cross sections are reported as functions of jet multiplicity, jet transverse momentum pT, jet rapidity, the scalar pT sum of the jets, and angular correlations between the muon and the jet for different jet multiplicities. The measured cross sections are in agreement with predictions that include multileg leading-order (LO) and next-to-LO matrix element calculations interfaced with parton showers, as well as a next-to-next-to-LO calculation for the W boson and one jet production.

Highlights

  • The high center-of-mass energy of collisions at the CERN LHC facilitates the production of events with an electroweak boson in association with a high transverse momentum pT jet or high-multiplicity multijet final state

  • In this paper we present the first differential cross section measurement of the W þ jets process at a center-of-mass energy of 13 TeV

  • The measured cross sections are compared to the fixed-order N-jettiness subtraction scheme (Njetti) NNLO calculation for W þ 1-jet production on the leading jet pT and jyj, HT, Δφðμ; j1Þ, and ΔRðμ; closest jetÞ distributions

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Summary

Introduction

The high center-of-mass energy of collisions at the CERN LHC facilitates the production of events with an electroweak boson in association with a high transverse momentum pT jet or high-multiplicity multijet final state. Measurements of vector boson production in association with jets provide important tests of perturbative quantum chromodynamics (QCD). Such measurements lead to a better understanding of the strong interaction and of the proton structure. The differential cross sections for the production of a W boson in association with jets (W þ jets) have been measured by the CMS Collaboration using data collected at center-of-mass energies of 7 TeV [1] and 8 TeV [2] and by the ATLAS Collaboration at 7 TeV [3] at the LHC.

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