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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/24565
Title: 
Measurement of the Polarization of W Bosons with Large Transverse Momenta in W plus jets Events at the LHC
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)
  • Univ Estado Rio de Janeiro
  • Purdue Univ
  • Purdue University Calumet
  • Rice University
  • University of Rochester
  • Rockefeller Univ
  • Rutgers State Univ
  • Univ Tennessee
  • Tech Univ Split
  • Texas A&M Univ
  • Scuola Normale
  • Univ Piemonte Orientale Novara
  • Texas Tech Univ
  • Vanderbilt Univ
  • University of Virginia (UVA)
  • Wayne State Univ
  • Univ Wisconsin
  • Universidade Federal do ABC (UFABC)
  • Suez Canal Univ
  • British Univ
  • Fayoum Univ
  • Univ Split
  • Ist Nazl Fis Nucl
  • Rudjer Boskovic Inst
  • Brandenburg Tech Univ Cottbus
  • Joint Inst Nucl Res
  • Sezione Ist Nazl Fis Nucl
  • Gaziosmanpasa Univ
  • Adiyaman Univ
  • Mersin Univ
  • Izmir Inst Technol
  • Kafkas Univ
  • Suleyman Demirel Univ
  • Univ Trieste
  • Ege Univ
  • Univ Southampton
  • Utah Valley Univ
  • Petersburg Nucl Phys Inst
  • Univ Cyprus
  • Erzincan Univ
  • Charles Univ Prague
  • Egyptian Network High Energy Phys
  • NICPB
  • Univ Helsinki
  • Kangwon Natl Univ
  • Helsinki Inst Phys
  • Lappeenranta Univ Technol
  • CNRS
  • CEA Saclay
  • Russian Acad Sci
  • Ecole Polytech
  • Univ Haute Alsace Mulhouse
  • Inst Natl Phys Nucl & Phys Particules IN2P3
  • Univ Lyon 1
  • Tbilisi State Univ
  • Kyungpook Natl Univ
  • RWTH Aachen University
  • DESY
  • Univ Hamburg
  • Institute for Theoretical and Experimental Physics (ITEP)
  • Univ Karlsruhe
  • Inst Nucl Phys Demokritos
  • Univ Athens
  • Univ Ioannina
  • Chonnam Natl Univ
  • KFKI Res Inst Particle & Nucl Phys
  • Inst Nucl Res ATOMKI
  • Univ Debrecen
  • Panjab Univ
  • University of Delhi
  • Bhabha Atom Res Ctr
  • Moscow MV Lomonosov State Univ
  • Tata Inst Fundamental Res
  • Inst Res & Fundamental Sci IPM
  • Korea University
  • Univ Bari
  • Politecn Bari
  • Univ Bologna
  • Univ Catania
  • PN Lebedev Phys Inst
  • Univ Florence
  • Univ Seoul
  • Univ Milano Bicocca
  • Univ Naples Federico II
  • Univ Padua
  • State Res Ctr Russian Federat
  • Univ Trento Trento
  • Sungkyunkwan Univ
  • Univ Pavia
  • Univ Perugia
  • Univ Pisa
  • Scuola Normale Super Pisa
  • Univ Roma La Sapienza
  • University of Belgrade
  • Vinca Inst Nucl Sci
  • Univ Turin
  • Eotvos Lorand Univ
  • Vilnius Univ
  • IPN
  • Univ Iberoamer
  • Benemerita Univ Autonoma Puebla
  • Univ Autonoma San Luis Potosi
  • Univ Auckland
  • Univ Canterbury
  • Quaid I Azam Univ
  • Univ Warsaw
  • Soltan Inst Nucl Studies
  • Visva Bharati Univ
  • CIEMAT
  • Lab Instrumentacao & Fis Expt Particulas
  • Universidade Estadual Paulista (UNESP)
  • Univ Autonoma Madrid
  • Univ Oviedo
  • Univ Cantabria
  • CERN
  • Paul Scherrer Inst
  • ETH
  • Univ Zurich
  • Sharif Univ Technol
  • Natl Cent Univ
  • Natl Taiwan Univ
  • Cukurova Univ
  • Bulgarian Acad Sci
  • Middle E Tech Univ
  • Bogazici Univ
  • Kharkov Inst Phys & Technol
  • Univ Bristol
  • Rutherford Appleton Lab
  • Univ London Imperial Coll Sci Technol & Med
  • Shiraz Univ
  • Brunel Univ
  • Baylor Univ
  • Boston University
  • Brown University
  • Univ Sofia
  • Univ Calif Davis
  • Univ Calif Los Angeles
  • University of California, Riverside (UCR)
  • Univ Calif San Diego
  • Univ Calif Santa Barbara
  • Isfahan Univ Technol
  • CALTECH
  • Carnegie Mellon Univ
  • Univ Colorado
  • Cornell Univ
  • Fairfield Univ
  • Inst High Energy Phys
  • Fermilab Natl Accelerator Lab
  • Univ Florida
  • Florida Int Univ
  • Florida State University
  • Univ Basilicata
  • Florida Inst Technol
  • UIC
  • Univ Iowa
  • Johns Hopkins Univ
  • University of Kansas (KU)
  • Kansas State University
  • Peking Univ
  • Univ Calif Berkeley
  • University of Maryland
  • MIT
  • Univ Siena
  • Univ Minnesota
  • University of Mississippi
  • Univ Nebraska
  • SUNY Buffalo
  • Northeastern University
  • Northwestern University (NU)
  • Univ Notre Dame
  • Universidad de los Andes
  • Ohio State Univ
  • Princeton University
  • Univ Geneva
  • Univ Puerto Rico
ISSN: 
0031-9007
Sponsorship: 
  • FMSR (Austria)
  • Fonds de la Recherche Scientifique (FNRS)
  • 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 (China)
  • Chinese Academy of Sciences (CAS)
  • MoST (China)
  • National Natural Science Foundation of China (NSFC)
  • COLCIENCIAS (Colombia)
  • MSES (Croatia)
  • Research Promotion Foundation (RPF)
  • Academy of Sciences (Estonia)
  • National Institute of Chemical Physics and Biophysics (NICPB)
  • Academy of Finland
  • ME (Finland)
  • Helsinki Institute of Physics (HIP)
  • Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
  • Institut national de physique nucléaire et de physique des particules (IN2P3/CNRS)
  • Bundesministerium für Bildung und Forschung (BMBF)
  • Deutsche Forschungsgemeinschaft (DFG)
  • HGF (Germany)
  • General Secretariat for Research and Technology (GSRT)
  • Hungarian Scientific Research Fund (OTKA)
  • NKTH (Hungary)
  • Department of Atomic Energy (DAE) - India
  • Department of Science and Technology (DST) - India
  • Institute for Research in Fundamental Sciences (IPM)
  • Science Foundation Ireland (SFI)
  • Istituto Nazionale di Fisica Nucleare (INFN)
  • National Research Foundation of Korea (NRF)
  • WCU (Korea)
  • LAS (Lithuania)
  • Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV)
  • Consejo Nacional de Ciencia y Tecnología (CONACYT)
  • SEP (Mexico)
  • UASLP-FAI (Mexico)
  • Pakistan Atomic Energy Commission (PAEC)
  • SCSR (Poland)
  • Fundação para a Ciência e a Tecnologia (FCT)
  • Joint Institute for Nuclear Research (JINR)
  • MST (Russia)
  • MAE (Russia)
  • Ministry of Science and Technological Development (MSTD) - Serbia
  • MICINN (Spain)
  • Centro Nacional de Física de Partículas, Astropartículas y Nuclear (CPAN)
  • Swiss Funding Agencies (Switzerland)
  • NSC (Taipei)
  • Scientific and Technological Research Council of Turkey (TUBITAK)
  • Türkiye Atom Enerjisi Kurumu (TAEK)
  • Science and Technology Facilities Council (STFC)
  • DOE (USA)
  • National Science Foundation (NSF) - USA
Abstract: 
A first measurement of the polarization of W bosons with large transverse momenta in pp collisions is presented. The measurement is based on 36 pb(-1) of data recorded at root s = 7 TeV by the CMS detector at the LHC. The left-handed, right-handed, and longitudinal polarization fractions (f(L), f(R), and f(0), respectively) of W bosons with transverse momenta larger than 50 GeV are determined by using decays to both electrons and muons. The muon final state yields the most precise measurement: (f(L) - f(R))(-) = 0.240 +/- 0.036(syst) +/- 0.031(syst) and f(0)(-) = 0.183 +/- 0.087(stat) +/- 0.123(syst) for negatively charged W bosons and (f(L) - f(R))(+) = 0.310 +/- 0.036(syst) +/- 0.017(syst) and f(0)(+) = 0.171 +/- 0.085(syst) +/- 0.099(syst) for positively charged W bosons. This establishes, for the first time, that W bosons produced in pp collisions with large transverse momenta are predominantly left-handed, as expected in the standard model.
Issue Date: 
6-Jul-2011
Citation: 
Physical Review Letters. College Pk: Amer Physical Soc, v. 107, n. 2, p. 15, 2011.
Time Duration: 
15
Publisher: 
Amer Physical Soc
Source: 
http://dx.doi.org/10.1103/PhysRevLett.107.021802
URI: 
http://hdl.handle.net/11449/24565
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/24565
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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