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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/73297
Title: 
Combination of CDF and D0 measurements of the W boson helicity in top quark decays
Author(s): 
Institution: 
  • Centro Brasileiro de Pesquisas Físicas (CBPF)
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Federal do ABC (UFABC)
  • McGill University
  • University of Science and Technology of China
  • Academia Sinica
  • Universidad de los Andes
  • Center for Particle Physics
  • Czech Technical University in Prague
  • Academy of Sciences of the Czech Republic
  • Universidad San Francisco de Quito
  • University of Helsinki
  • CNRS/IN2P3
  • Institut National Polytechnique de Grenoble
  • SPP
  • RWTH Aachen University
  • Universität Freiburg
  • Georg-August-Universität Göttingen
  • Karlsruhe Institute of Technology
  • Universität Mainz
  • Ludwig-Maximilians-Universität München
  • Bergische Universität Wuppertal
  • University of Athens
  • Panjab University
  • Delhi University
  • Tata Institute of Fundamental Research
  • University College Dublin
  • Istituto Nazionale di Fisica Nucleare Bologna
  • University of Bologna
  • Istituto Nazionale di Fisica Nucleare
  • Sezione di Padova-Trento
  • University of Padova
  • Istituto Nazionale di Fisica Nucleare Pisa
  • University of Pisa
  • University of Siena
  • Scuola Normale Superiore
  • Sezione di Roma 1
  • Sapienza Università di Roma
  • Istituto Nazionale di Fisica Nucleare Trieste/Udine
  • University of Udine
  • Okayama University
  • Osaka City University
  • Waseda University
  • University of Tsukuba
  • Kyungpook National University
  • Korea University
  • CINVESTAV
  • Science Park
  • Radboud University Nijmegen
  • Joint Institute for Nuclear Research
  • Institute for Theoretical and Experimental Physics (ITEP)
  • Moscow State University
  • Institute for High Energy Physics
  • Petersburg Nuclear Physics Institute
  • Comenius University
  • Universitat Autonoma de Barcelona
  • Institut de Física d'Altes Energies (IFAE)
  • Centro de Investigaciones Energeticas Medioambientales y Tecnologicas
  • CSIC-University of Cantabria
  • Uppsala University
  • University of Geneva
  • Glasgow University
  • Lancaster University
  • University of Liverpool
  • Imperial College London
  • University College London
  • University of Manchester
  • University of Oxford
  • University of Arizona
  • Ernest Orlando Lawrence Berkeley National Laboratory
  • University of California, Davis
  • University of California, Los Angeles
  • University of California, Riverside (UCR)
  • Yale University
  • University of Florida
  • Florida State University
  • Argonne National Laboratory
  • Fermi National Accelerator Laboratory
  • University of Chicago
  • University of Illinois at Chicago
  • Northern Illinois University
  • Northwestern University (NU)
  • University of Illinois
  • Indiana University
  • Purdue University Calumet
  • University of Notre Dame
  • Purdue University
  • Iowa State University
  • University of Kansas (KU)
  • Kansas State University
  • Louisiana Tech University
  • Johns Hopkins University
  • Boston University
  • Northeastern University
  • Harvard University
  • Massachusetts Institute of Technology (MIT)
  • Tufts University
  • University of Michigan
  • Wayne State University
  • Michigan State University
  • University of Mississippi
  • University of Nebraska
  • University of New Mexico
  • Rockefeller University
  • Rutgers University
  • Princeton University
  • State University of New York
  • Columbia University
  • University of Rochester
  • Brookhaven National Laboratory
  • Duke University
  • Ohio State University
  • Langston University
  • University of Oklahoma
  • Oklahoma State University
  • Carnegie Mellon University
  • University of Pittsburgh
  • University of Pennsylvania
  • Brown University
  • University of Texas
  • Texas AandM University
  • Southern Methodist University
  • Rice University
  • Baylor University
  • University of Virginia (UVA)
  • University of Washington
  • University of Wisconsin
  • Augustana College
  • Universidad de Oviedo
  • Institute of Experimental Physics
  • CNRS-IN2P3
  • Universidad Iberoamericana
  • ETH
  • CERN
  • University of London
  • University of Melbourne
  • National Research Nuclear University
  • University of California Santa Cruz
  • Yarmouk University
  • Muons, Inc.
  • UPIITA-IPN
  • University of Cyprus
  • DESY
  • SLAC
  • Cornell University
  • Chonbuk National University
  • Kinki University
  • University of Fukui
  • University of California Santa Barbara
  • Chonnam National University
  • Texas Tech University
  • Centro de Investigacion en Computacion-IPN
  • Sezione di Cagliari
  • University of Iowa
  • Universidad Autonoma de Sinaloa
  • Universidad Tecnica Federico Santa Maria
  • U.S. Department of Energy
  • Universidade Estadual Paulista (UNESP)
  • Nagasaki Institute of Applied Science
  • University of California Irvine
  • Korea Institute of Science and Technology Information
  • Simon Fraser University
  • University of Toronto
  • TRIUMF
  • Université de Lyon
  • Seoul National University
  • Sungkyunkwan University
ISSN: 
  • 1550-7998
  • 1550-2368
Abstract: 
We report the combination of recent measurements of the helicity of the W boson from top quark decay by the CDF and D0 collaborations, based on data samples corresponding to integrated luminosities of 2.7-5.4fb -1 of pp̄ collisions collected during Run II of the Fermilab Tevatron collider. Combining measurements that simultaneously determine the fractions of W bosons with longitudinal (f 0) and right-handed (f +) helicities, we find f 0=0.722±0.081[±0.062(stat)±0.052(syst)] and f +=-0.033±0.046[±0.034(stat)±0.031(syst)]. Combining measurements where one of the helicity fractions is fixed to the value expected in the standard model, we find f 0=0.682±0. 057[±0.035(stat)±0.046(syst)] for fixed f + and f +=-0.015±0.035[±0.018(stat)±0.030(syst)] for fixed f 0. The results are consistent with standard model expectations. © 2012 American Physical Society.
Issue Date: 
27-Apr-2012
Citation: 
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 7, 2012.
Source: 
http://dx.doi.org/10.1103/PhysRevD.85.071106
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/73297
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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