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Title
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Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at = 7 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| 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 = mu mu 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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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2014
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP06(2014)120
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Volume/pages
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6
(2014)
, 39 p.
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Article Reference
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120
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ISI
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000338346200001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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