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

Chatrchyan, Serguei

doi:10.1007/JHEP06(2014)120

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

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.

Authors:

Chatrchyan, Serguei ^[1]

et al.

Publication Date:: Thu Feb 06 00:00:00 EST 2014

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: CMS Collaboration

OSTI Identifier:: 1151723

Report Number(s):: FERMILAB-PUB-14-079-CMS; CERN-PH-EP-2014-005; CMS-SMP-13-004
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1402.1521

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2014; Journal Issue: 6; Journal ID: ISSN 1029-8479

Publisher:: Springer Berlin

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Chatrchyan, Serguei. Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at sqrt(s) = 7 TeV.  United States: N. p., 2014. 
Web.  doi:10.1007/JHEP06(2014)120.

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                    Chatrchyan, Serguei. Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at sqrt(s) = 7 TeV.  United States.  https://doi.org/10.1007/JHEP06(2014)120

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                    Chatrchyan, Serguei. Thu .  
"Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at sqrt(s) = 7 TeV".  United States.  https://doi.org/10.1007/JHEP06(2014)120.  https://www.osti.gov/servlets/purl/1151723.

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@article{osti_1151723,

  title        = {Measurement of the production cross sections for a Z boson and one or more b jets in pp collisions at sqrt(s) = 7 TeV},

  author       = {Chatrchyan, Serguei},

  abstractNote = {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.},

  doi          = {10.1007/JHEP06(2014)120},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 6,

  volume       = 2014,

  place        = {United States},

  year         = {Thu Feb 06 00:00:00 EST 2014},

  month        = {Thu Feb 06 00:00:00 EST 2014}

}

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