Artículos de revistas
Observation of ZZ production in pp̄ collisions at s=1.96TeV
Fecha
2008-10-23Registro en:
Physical Review Letters, v. 101, n. 17, 2008.
1079-7114
0031-9007
10.1103/PhysRevLett.101.171803
2-s2.0-55149084833
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 Alberta
Simon Fraser University
York University
McGill University
University of Science and Technology of China
Universidad de Los Andes
Charles University
Czech Technical University
Academy of Sciences of the Czech Republic
Universidad San Francisco de Quito
CNRS/IN2P3
Institut National Polytechnique de Grenoble
IN2P3/CNRS
Universités Paris VI and VII
SPP
Université de Lyon
RWTH Aachen University
Universität Bonn
Universität Freiburg
Universität Mainz
Ludwig-Maximilians-Universität München
University of Wuppertal
Panjab University
Delhi University
Tata Institute of Fundamental Research
University College Dublin
Korea University
SungKyunKwan University
CINVESTAV
University of Amsterdam/NIKHEF
NIKHEF
Joint Institute for Nuclear Research
Institute for Theoretical and Experimental Physics
Moscow State University
Institute for High Energy Physics
Petersburg Nuclear Physics Institute
Lund University
Stockholm University
Uppsala University
Lancaster University
Imperial College
University of Manchester
University of Arizona
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Fermi National Accelerator Laboratory
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INFN Torino
Universidad Autonoma de Sinaloa
Georg-August-University
Helsinki Institute of Physics
Universität Bern
Universität Zürich
Institución
Resumen
We present an observation for ZZ→l+l-l′+l′- (l, l′=e or μ) production in pp̄ collisions at a center-of-mass energy of s=1.96TeV. Using 1.7fb-1 of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14-0.02+0.03 events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in ZZ→l+l-νν̄, yields a significance of 5.7 standard deviations and a combined cross section of σ(ZZ)=1.60±0.63(stat)-0.17+0.16(syst) pb. © 2008 The American Physical Society.