Abstract
The mechanism of production of heavy-flavoured jets, originated by the hadronization of b or c quarks, in association with vector bosons, W or Z, in the Standard Model is of primary importance. The study of events with one or two well-identified and isolated leptons accompanied by b-jets or displaced secondary vertices is therefore crucial to refine the theoretical calculations in perturbative QCD, as well as validate associated predictions from simulation. The understanding of these processes is furthermore required by Higgs and Beyond the Standard Model searches with similar final states. Using the LHC proton-proton collision data collected at a center of mass energy of 7 TeV by the CMS detector, measurements of the W+b, W+c, Z+b and Z+B hadrons cross sections are presented, comparing experimental data with several theoretical predictions in quantum chromodynamics.
Highlights
Summary. — The mechanism of production of heavy-flavoured jets, originated by the hadronization of b or c quarks, in association with vector bosons, W or Z, in the Standard Model is of primary importance
Results are compared to the theoretical predictions of the next-to-leading order event generator MCFM [2]
Fig. 1. – Top-left: comparison of the theoretical predictions for the W+c cross section computed with MCFM and several sets of PDFs with the average of the experimental measurements, combining the electron and muon final states
Summary
Summary. — The mechanism of production of heavy-flavoured jets, originated by the hadronization of b or c quarks, in association with vector bosons, W or Z, in the Standard Model is of primary importance. The cross section for this final state is measured using an integrated luminosity of 5 fb−1 with the LHC center-of-mass energy of 7 TeV [1].
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