Abstract
Differential cross sections for a W boson produced in association with jets are measured in a data sample of proton-proton collisions at a center-of-mass energy of 8 TeV recorded with the CMS detector and corresponding to an integrated luminosity of 19.6 inverse femtobarns. The W bosons are identified through their decay mode W to mu nu. The cross sections are reported as functions of jet multiplicity, transverse momenta, and the scalar sum of jet transverse momenta (HT) for different jet multiplicities. Distributions of the angular correlations between the jets and the muon are examined, as well as the average number of jets as a function of HT and as a function of angular variables. The measured differential cross sections are compared with tree-level and higher-order recent event generators, as well as next-to-leading-order and next-to-next-to-leading-order theoretical predictions. The agreement of the generators with the measurements builds confidence in their use for the simulation of W+jets background processes in searches for new physics at the LHC.
Highlights
This paper presents measurements of differential cross sections for associated production of a W boson and jets in proton-proton collisions at a center-of-mass energy of 8 TeV at the CERN LHC
III), to those of MADGRAPH5_aMC@NLO and SHERPA 2 NLO Monte Carlo (MC) generators, and to the fixed-order theoretical predictions provided by BLACKHATþSHERPA [43] and by a W þ 1 jet NNLO calculation [6,7]
Differential cross sections for a W boson produced in association with jets in pp collisions at a center-of-mass energy of 8 TeV were measured
Summary
This paper presents measurements of differential cross sections for associated production of a W boson and jets in proton-proton collisions at a center-of-mass energy of 8 TeV at the CERN LHC. The average number of jets per event, hNjetsi, is further studied as a function of HT and angular variables These measuremepntsffiffi are based on a sample of protonproton collisions at s 1⁄4 8 TeV recorded with the CMS detector, corresponding to an integrated luminosity of. In order to perform differential measurements of the W þ jets cross section, a high-purity sample of muonic W boson decays is selected and the distributions are corrected back to the stable-particle level by means of a regularized unfolding procedure.
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