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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/129583
Title: 
Measurement of the W boson helicity in events with a single reconstructed top quark in p p collisions at root s=8 TeV
Author(s): 
Institution: 
  • Yerevan Phys Inst
  • Inst Hochenergiephys OeAW
  • Natl Ctr Particle &High Energy Phys
  • Univ Antwerp
  • Vrije Univ Brussel
  • Univ Libre Bruxelles
  • Univ Ghent
  • Catholic Univ Louvain
  • Univ Mons
  • Ctr Brasileiro Pesquisas Fis
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Estadual Paulista (UNESP)
  • Universidade Federal do ABC (UFABC)
  • Bulgarian Acad Sci
  • Univ Sofia
  • Inst High Energy Phys
  • Peking Univ
  • Univ Los Andes
  • 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 Haute Alsace Mulhouse
  • Inst Natl Phys Nucl &Phys Particules
  • Univ Lyon 1
  • Tbilisi State Univ
  • Rhein Westfal TH Aachen
  • DESY
  • Univ Hamburg
  • Univ Karlsruhe
  • NCSR Demokritos
  • Univ Athens
  • Univ Ioannina
  • Wigner Res Ctr Phys
  • Inst Nucl Res ATOMKI
  • Univ Debrecen
  • Natl Inst Sci Educ &Res
  • Panjab Univ
  • Univ Delhi
  • Saha Inst Nucl Phys
  • Bhabha Atom Res Ctr
  • Tata Inst Fundamental Res
  • Inst Res Fundamental Sci IPM
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  • Univ Florence
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  • Univ Naples Federico II
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  • Univ G Marconi
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  • Univ Warsaw
  • Lab Instrumentacao &Fis Expt Particulas
  • Joint Inst Nucl Res
  • Petersburg Nucl Phys Inst
  • Russian Acad Sci
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  • CERN
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  • Univ London Imperial Coll Sci Technol &Med
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ISSN: 
1029-8479
Sponsorship: 
  • BMWFW and FWF (Austria)
  • FNRS and FWO (Belgium)
  • 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)
  • MES (Bulgaria)
  • CERN
  • CAS
  • MoST
  • NSFC (China)
  • COLCIENCIAS (Colombia)
  • MSES
  • CSF (Croatia)
  • RPF (Cyprus)
  • MoER
  • ERC IUT
  • ERDF (Estonia)
  • Academy of Finland
  • MEC
  • HIP (Finland)
  • CEA
  • CNRS/IN2P3 (France)
  • BMBF
  • DFG
  • HGF (Germany)
  • GSRT (Greece)
  • OTKA
  • NIH (Hungary)
  • DAE
  • DST (India)
  • IPM (Iran)
  • SFI (Ireland)
  • INFN (Italy)
  • NRF
  • WCU (Republic of Korea)
  • LAS (Lithuania)
  • MOE
  • UM (Malaysia)
  • CINVESTAV
  • CONACYT
  • SEP
  • UASLP-FAI (Mexico)
  • MBIE (New Zealand)
  • PAEC (Pakistan)
  • MSHE
  • NSC (Poland)
  • FCT (Portugal)
  • JINR (Dubna)
  • MON
  • RosAtom
  • RAS
  • RFBR (Russia)
  • MESTD (Serbia)
  • SEIDI
  • CPAN (Spain)
  • Swiss Funding Agencies (Switzerland)
  • MST (Taipei)
  • ThEPCenter
  • IPST
  • STAR
  • NSTDA (Thailand)
  • TUBITAK
  • TAEK (Turkey)
  • NASU
  • SFFR (Ukraine)
  • STFC (United Kingdom)
  • DOE
  • NSF (U. S. A.)
  • Marie-Curie programme
  • European Research Council
  • EPLANET (European Union)
  • Leventis Foundation
  • A. P. Sloan Foundation
  • Alexander von Humboldt Foundation
  • 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)
  • Ministry of Education, Youth and Sports (MEYS) of the Czech Republic
  • Council of Science and Industrial Research, India
  • HOMING PLUS programme of Foundation for Polish Science
  • European Union
  • Regional Development Fund
  • Compagnia di San Paolo (Torino)
  • Consorzio per la Fisica (Trieste)
  • MIUR project (Italy)
  • Thalis and Aristeia programmes - EU-ESF
  • Greek NSRF
  • National Priorities Research Program by Qatar National Research Fund
Sponsorship Process Number: 
MIUR: 20108T4XTM
Abstract: 
A measurement of the W boson helicity is presented, where the W boson originates from the decay of a top quark produced in pp collisions. The event selection, optimized for reconstructing a single top quark in the final state, requires exactly one isolated lepton (muon or electron) and exactly two jets, one of which is likely to originate from the hadronization of a bottom quark. The analysis is performed using data recorded at a center-of-mass energy of 8 TeV with the CMS detector at the CERN LHC in 2012. The data sample corresponds to an integrated luminosity of 19.7 fb(-1). The measured helicity fractions are F-L = 0.298 +/- 0.028 (stat) +/- 0.032(syst), F-0 = 0.720 +/- 0.039 (stat) +/- 0.037(syst), and F-R = -0.018 +/- 0.019 (stat) +/- 0.011(syst). These results are used to set limits on the real part of the tWb anomalous couplings, g(L) and g(R).
Issue Date: 
12-Jan-2015
Citation: 
Journal Of High Energy Physics. New York: Springer, n. 1, p. 1-35, 2015.
Time Duration: 
1-35
Publisher: 
Springer
Keywords: 
  • Electroweak interaction
  • Hadron-Hadron Scattering
Source: 
http://link.springer.com/article/10.1007%2FJHEP01%282015%29053
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/129583
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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