Artículos de revistas
Wγ production and limits on anomalous WWγ couplings in pp̄ collisions at √s=1.96TeV
Fecha
2011-12-09Registro en:
Physical Review Letters, v. 107, n. 24, 2011.
0031-9007
1079-7114
10.1103/PhysRevLett.107.241803
2-s2.0-83655165299
Autor
Universidad de Buenos Aires
Centro Brasileiro de Pesquisas Físicas
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Federal do ABC (UFABC)
Universidade Estadual Paulista (UNESP)
University of Science and Technology of China
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
CNRS/IN2P3
Institut National Polytechnique de Grenoble
SPP
RWTH Aachen University
Universität Freiburg
Georg-August-Universität Göttingen
Universität Mainz
Ludwig-Maximilians-Universität München
Bergische Universität Wuppertal
Panjab University
Delhi University
Tata Institute of Fundamental Research
University College Dublin
Korea University
CINVESTAV
Science Park
Radboud University Nijmegen
Joint Institute for Nuclear Research
Institute for Theoretical and Experimental Physics
Moscow State University
Institute for High Energy Physics
Petersburg Nuclear Physics Institute
Institut de Física d'Altes Energies (IFAE)
Stockholm University
Lancaster University
Imperial College London
University of Manchester
University of Arizona
University of California Riverside
Florida State University
Fermi National Accelerator Laboratory
University of Illinois at Chicago
Northern Illinois University
Northwestern University
Indiana University
Purdue University Calumet
University of Notre Dame
Iowa State University
University of Kansas
Kansas State University
Louisiana Tech University
Boston University
Northeastern University
University of Michigan
Michigan State University
University of Mississippi
University of Nebraska
Rutgers University
Princeton University
State University of New York
Columbia University
University of Rochester
Brookhaven National Laboratory
Langston University
University of Oklahoma
Oklahoma State University
Brown University
University of Texas
Southern Methodist University
Rice University
University of Virginia
University of Washington
Uppsala University
Augustana College
University of Liverpool
UPIITA-IPN
SLAC
University College London
Centro de Investigacion en Computacion - IPN
Universidad Autonoma de Sinaloa
Universität Bern
Université de Lyon
Institución
Resumen
We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W(→lν)+γ production in eγ and μγ final states. Using data corresponding to an integrated luminosity of 4.2fb -1 collected with the D0 detector at the Fermilab Tevatron Collider, the measured cross section times branching fraction for the process pp̄→Wγ+X→lνγ+X and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WWγ couplings for data from hadron colliders: -0.4<Δκ γ<0.4 and -0. 08<λ γ<0.07 at the 95% C.L. © 2011 American Physical Society.