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Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at s√ = 7 TeV

CMS Collaboration
Bean, Alice
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Abstract
The production of a Z boson, decaying into two leptons and produced in association with one or more b jets, is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV. The data were recorded in 2011 with the CMS detector and correspond to an integrated luminosity of 5 fb−1. The Z(ℓℓ) + b-jets cross sections (where ℓℓ = μμ or ee) are measured separately for a Z boson produced with exactly one b jet and with at least two b jets. In addition, a cross section ratio is extracted for a Z boson produced with at least one b jet, relative to a Z boson produced with at least one jet. The measured cross sections are compared to various theoretical predictions, and the data favour the predictions in the five-flavour scheme, where b quarks are assumed massless. The kinematic properties of the reconstructed particles are compared with the predictions from the MadGraph event generator using the pythia parton shower simulation.
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This is the published version.
Date
2014-06
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Publisher
Springer Verlag
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Keywords
Jet physics, Hadron-Hadron Scattering
Citation
The CMS collaboration. "Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at s√ = 7 TeV." Journal of High Energy Physics. June, 2015, v5n6. http://dx.doi.org/10.1007/JHEP06(2014)120
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