Abstract
The measurements of single W, Z boson production in association with jets probes QCD in a multi-scale environment. In this paper, we summarize the latest measurements of W +jet and Z +jet production and their ratio, extending to high jet multiplicities over a large set of kinematic distributions for proton-proton collisions at a center of mass energy of 7 TeV data at the LHC. The results are compared to the latest theoretical predictions of modern Monte Carlo generators. In addition, the measurement of production of vector bosons in association with heavy flavours allows to study c and b-quark parton distribution functions (PDFs) and gluon splitting effects. Also the corresponding measurements of W + c and Z + b (b ) are reported and compared to predictions based on various PDFs in four and five-flavour schemes.
Highlights
The production of W and Z bosons is well understood and provides a clear experimental signal in the leptonic decay channels into electrons e and muons μ, which allow for the most precise cross-section measurements
The differential cross section dσ/dm is theoretically described by perturbative QCD
The first run of the LHC allowed for several precision measurements of the production cross-section of the vector bosons in proton-proton collisions in a new energy regime
Summary
The production of W and Z bosons is well understood and provides a clear experimental signal in the leptonic decay channels into electrons e and muons μ, which allow for the most precise cross-section measurements. This short review presents several recent measurements of Z boson, performed at the ATLAS detector. These are based on 7 TeV and 8 TeV data-set with an integrated luminosity of L ∼ 4.6 fb−1 in 2011 and ∼ 20 fb−1 in 2012, respectively.
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