Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at sqrt(s) = 7 TeV
Buchmann, Marco A.
Marini, Andrea C.
Martinez Ruiz del Arbol, Pablo
Ronga, Frédéric J.
Weber, Hannsjörg A.
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
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 Show more
Journal / seriesJournal of High Energy Physics
Pages / Article No.
SubjectJet physics; Hadron-Hadron Scattering
Organisational unit03381 - Pauss, Felicitas (emeritus)
03593 - Dissertori, Günther
03904 - Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
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