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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/111312
Title: 
Identification of b-quark jets with the CMS experiment
Author(s): 
Institution: 
  • Yerevan Phys Inst
  • OeAW
  • Natl Ctr Particle & High Energy Phys
  • Univ Antwerp
  • Vrije Univ Brussel
  • Univ Libre Brussels
  • Univ Ghent
  • Catholic Univ Louvain
  • Univ Mons
  • Centro Brasileiro de Pesquisas Físicas (CBPF)
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Inst Fis Teor CA
  • Universidade Estadual Paulista (UNESP)
  • Inst Nucl Energy Res
  • Univ Sofia
  • Inst High Energy Phys
  • Peking Univ
  • Universidad de los Andes
  • Tech Univ Split
  • Univ Split
  • Rudjer Boskovic Inst
  • Univ Cyprus
  • Charles Univ Prague
  • Acad Sci Res & Technol Arab Republ Egypt
  • NICPB
  • Univ Helsinki
  • Helsinki Inst Phys
  • Lappeenranta Univ Technol
  • CEA Saclay
  • Ecole Polytech
  • Univ Strasbourg
  • CNRS
  • Univ Lyon 1
  • Tbilisi State Univ
  • RWTH Aachen University
  • DESY
  • Univ Hamburg
  • Univ Karlsruhe
  • Inst Nucl Phys Demokritos
  • Univ Athens
  • Univ Ioannina
  • KFKI Res Inst Particle & Nucl Phys
  • Inst Nucl Res ATOMKI
  • Debrecen Univ Med
  • Panjab Univ
  • University of Delhi
  • Saha Inst Nucl Phys
  • Bhabha Atom Res Ctr
  • Tata Inst Fundamental Res EHEP
  • Tata Inst Fundamental Res HECR
  • Inst Res Fundamental Sci IPM
  • Ist Nazl Fis Nucl
  • Univ Bari
  • Politecn Bari
  • Univ Bologna
  • Univ Catania
  • Univ Florence
  • Univ Genoa
  • Univ Milano Bicocca
  • Univ Naples Federico II
  • Univ Padua
  • Univ Trent
  • Univ Pavia
  • Univ Perugia
  • Univ Pisa
  • Scuola Normale Super Pisa
  • Univ Rome
  • Univ Turin
  • Univ Piemonte Orientale Novara
  • Univ Trieste
  • Kangwon Natl Univ
  • Kyungpook Natl Univ
  • Chonnam Natl Univ
  • Korea University
  • Univ Seoul
  • Sungkyunkwan Univ
  • Vilnius State Univ
  • IPN
  • Univ Iberoamer
  • Benemerita Univ Autonoma Puebla
  • Univ Autonoma San Luis Potosi
  • Univ Auckland
  • Univ Canterbury
  • Quaid I Azam Univ
  • Natl Ctr Nucl Res
  • Univ Warsaw
  • Lab Instrumentacao & Fis Expt Particulas
  • Joint Inst Nucl Res
  • Petersburg Nucl Phys Inst
  • Russian Acad Sci
  • Institute for Theoretical and Experimental Physics (ITEP)
  • Moscow MV Lomonosov State Univ
  • PN Lebedev Phys Inst
  • University of Belgrade
  • Vinca Inst Nucl Sci
  • CIEMAT
  • Univ Autonoma Madrid
  • Univ Oviedo
  • Univ Cantabria
  • CERN
  • Paul Scherrer Inst
  • ETH
  • Univ Zurich
  • Natl Cent Univ
  • Natl Taiwan Univ
  • Cukurova Univ
  • Middle E Tech Univ
  • Bogazici Univ
  • Istanbul Tech Univ
  • Kharkov Phys & Technol Inst
  • Univ Bristol
  • Rutherford Appleton Lab
  • Univ London Imperial Coll Sci Technol & Med
  • Brunel Univ
  • Baylor Univ
  • Univ Alabama
  • Boston University
  • Brown University
  • Univ Calif Davis
  • Univ Calif Los Angeles
  • University of California, Riverside (UCR)
  • Univ Calif San Diego
  • Univ Calif Santa Barbara
  • CALTECH
  • Carnegie Mellon Univ
  • Univ Colorado
  • Cornell Univ
  • Fairfield Univ
  • Fermilab Natl Accelerator Lab
  • Univ Florida
  • Florida Int Univ
  • Florida State University
  • Florida Inst Technol
  • Univ Illinois
  • Univ Iowa
  • Johns Hopkins Univ
  • University of Kansas (KU)
  • Kansas State University
  • Lawrence Livermore Natl Lab
  • University of Maryland
  • MIT
  • Univ Minnesota
  • University of Mississippi
  • Univ Nebraska
  • SUNY Buffalo
  • Northeastern University
  • Northwestern University (NU)
  • Univ Notre Dame
  • Ohio State Univ
  • Princeton University
  • Univ Puerto Rico
  • Purdue Univ
  • Purdue University Calumet
  • Rice University
  • University of Rochester
  • Rockefeller Univ
  • Rutgers State Univ
  • Univ Tennessee
  • Texas A&M Univ
  • Texas Tech Univ
  • Vanderbilt Univ
  • University of Virginia (UVA)
  • Wayne State Univ
  • Univ Wisconsin
  • Vienna Univ Technol
  • Universidade Federal do ABC (UFABC)
  • Suez Canal Univ
  • Zewail City Sci & Technol
  • Cairo Univ
  • Fayoum Univ
  • British Univ Egypt
  • Ain Shams Univ
  • Univ Haute Alsace
  • Brandenburg Tech Univ Cottbus
  • Eotvos Lorand Univ
  • Visva Bharati Univ
  • Sharif Univ Technol
  • Isfahan Univ Technol
  • Islamic Azad Univ
  • Univ Basilicata
  • Univ Guglielmo Marconi
  • Univ Siena
  • Univ Bucharest
  • Gaziosmanpasa Univ
  • Adiyaman Univ
  • Izmir Inst Technol
  • Mersin Univ
  • Ozyegin Univ
  • Kafkas Univ
  • Suleyman Demirel Univ
  • Ege Univ
  • Univ Southampton
  • Univ Sydney
  • Utah Valley Univ
  • Argonne Natl Lab
  • Erzincan Univ
ISSN: 
1748-0221
Sponsorship: 
  • Austrian Federal Ministry of Science and Research
  • Belgium Fonds de la Recherche Scientifique
  • Fonds voor Wetenschappelijk Onderzoek
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
  • Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Bulgarian Ministry of Education and Science
  • CERN
  • Chinese Academy of Sciences
  • Ministry of Science and Technology
  • National Natural Science Foundation of China
  • Colombian Funding Agency (COLCIENCIAS)
  • Croatian Ministry of Science, Education and Sport
  • Research Promotion Foundation, Cyprus
  • Ministry of Education and Research
  • European Regional Development Fund, Estonia
  • Academy of Finland
  • Finnish Ministry of Education and Culture
  • Helsinki Institute of Physics
  • Institut National de Physique Nucleaire et de Physique des Particules / CNRS, France
  • Commissariat a l' Energie Atomique et aux Energies Alternatives / CEA, France
  • Bundesministerium fur Bildung und Forschung, Germany
  • Deutsche Forschungsgemeinschaft, Germany
  • Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany
  • General Secretariat for Research and Technology, Greece
  • National Scientific Research Foundation
  • National Office for Research and Technology, Hungary
  • Department of Atomic Energy and the Department of Science and Technology, India
  • Institute for Studies in Theoretical Physics and Mathematics, Iran
  • Science Foundation, Ireland
  • Istituto Nazionale di Fisica Nucleare, Italy
  • Korean Ministry of Education, Science and Technology, India
  • World Class University program of NRF, Korea
  • Lithuanian Academy of Sciences
  • CINVESTAV
  • CONACYT
  • SEP
  • UASLP-FAI
  • Ministry of Science and Innovation, New Zealand
  • Pakistan Atomic Energy Commission
  • Ministry of Science and Higher Education
  • National Science Centre, Poland
  • Fundacao para a Ciencia e a Tecnologia, Portugal
  • JINR (Armenia)
  • JINR (Belarus)
  • JINR (Georgia)
  • JINR (Ukraine)
  • JINR (Uzbekistan)
  • Ministry of Education and Science of the Russian Federation
  • Federal Agency of Atomic Energy of the Russian Federation
  • Russian Academy of Sciences
  • Russian Foundation for Basic Research
  • Ministry of Science and Technological Development of Serbia
  • Secretaria de Estado de Investigacion, Desarrollo e Innovacion, Spain
  • Programa Consolider-Ingenio, Spain
  • ETH Board
  • ETH Zurich
  • PSI
  • SNF
  • UniZH
  • Canton Zurich
  • SER
  • National Science Council, Taipei
  • Scientific and Technical Research Council of Turkey
  • Turkish Atomic Energy Authority
  • Science and Technology Facilities Council, UK
  • US Department of Energy
  • US National Science Foundation
  • Marie-Curie programme
  • European Research Council (European Union)
  • Leventis Foundation
  • A. P. Sloan Foundation
  • Alexander von Humboldt Foundation
  • Austrian Science Fund (FWF)
  • Belgian Federal Science Policy Office
  • Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)
  • Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
  • Council of Science and Industrial Research, India
  • Compagnia di San Paolo (Torino)
  • Foundation for Polish Science
  • European Union
Sponsorship Process Number: 
Ministry of Education and ResearchSF0690030s09
Abstract: 
At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms has been developed by CMS to select b-quark jets based on variables such as the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, and the presence or absence of a lepton, or combinations thereof. The performance of these algorithms has been measured using data from proton-proton collisions at the LHC and compared with expectations based on simulation. The data used in this study were recorded in 2011 at root s = 7TeV for a total integrated luminosity of 5.0 fb(-1). The efficiency for tagging b-quark jets has been measured in events from multijet and t-quark pair production. CMS has achieved a b-jet tagging efficiency of 85% for a light-parton misidentification probability of 10% in multijet events. For analyses requiring higher purity, a misidentification probability of only 1.5% has been achieved, for a 70% b-jet tagging efficiency.
Issue Date: 
1-Apr-2013
Citation: 
Journal Of Instrumentation. Bristol: Iop Publishing Ltd, v. 8, 66 p., 2013.
Time Duration: 
66
Publisher: 
Iop Publishing Ltd
Keywords: 
  • Large detector-systems performance
  • Pattern recognition, cluster finding, calibration and fitting methods
  • Performance of High Energy Physics Detectors
Source: 
http://dx.doi.org/10.1088/1748-0221/8/04/P04013
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/111312
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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