2014/02/28 by CMS Collaboration, S. Chatrchyan, V. Khachatryan +98
Physics and Astronomy · #Astrophysics #Boson #Electron #Event generator #Gauge (firearms) #High-Energy Particle Collisions Research #Jet (fluid) #Large Hadron Collider #Lepton #Luminosity #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Parton shower #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Standard Model (mathematical formulation) #hep-ex
paper · pdf · doi:10.1007/jhep06(2014)120
published as JHEP 06 (2014) 120 · Replaced with published version. Added journal reference and DOI
openalex publication_date 2014/06/01 · arxiv created 2014/07/07 · arxiv updated 2014/07/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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( )+b-jets cross sections (where = 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.