Measurements of the production of a vector boson in association with jets in the ATLAS and CMS detectors

Vieri Candelise

doi:10.1051/epjconf/201612005003

Abstract

The production of a vector boson (V = W, Z) in association with jets is can be used for a precise test of perturbative QCD and is a dominant background process in many searches for physics beyond the Standard Model. The differential cross section measurements from CMS and ATLAS collaborations would be presented, and several theoretical predictions at leading order (LO) and next-to leading order (NLO) are compared to data, after the deconvolution of detector effects, with proton-proton collisions at a center of mass energy of 7, 8 and 13 TeV at LHC.

Highlights

The associated production of vector bosons and jets (V+jets) in proton-proton collisions at LHC is of prime interest in the physics program of the ATLAS and CMS experiments [1,2]
Differential cross sections for the associated production of a W or Z boson and jets have been measured in the ATLAS and CMS experiments at a center of mass energy of 7, 8 and 13 TeV in proton-proton collisions at LHC
The W boson plus jets has been measured in ATLAS and CMS at 7 TeV and compared to several leading order (LO) and next-to leading order (NLO) predictions; the Z+jets has been measured by CMS at 8 TeV, showing the double-differential cross sections as a function of the momentum and rapidity of the leading jet, and in ATLAS at 13 TeV

Summary

Introduction

The associated production of vector bosons and jets (V+jets) in proton-proton collisions at LHC is of prime interest in the physics program of the ATLAS and CMS experiments [1,2]. This type of processes is important for several physics aspects. Many Beyond the Standard Model searches (such as supersymmetry, new Higgs bosons, 4th generation of heavy quarks) have a similar topology with respect to the V+jets production, and the control on their backgrounds might be highly improved by means of these measurements

Associated production of a W boson and jets

Associated production of a Z boson and jets

Associated production of a Z boson and b jets in CMS

Conclusions