Artículos de revistas
Measurement of the Λb0 lifetime using semileptonic decays
Fecha
2007-10-30Registro en:
Physical Review Letters, v. 99, n. 18, 2007.
1079-7114
0031-9007
10.1103/PhysRevLett.99.182001
2-s2.0-35648960875
Autor
Universidad de Buenos Aires
Centro Brasileiro de Pesquisas Físicas
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (UNESP)
University of Alberta
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
Université Blaise Pascal
Universite de Grenoble 1
Université de la Méditerranée
Université Paris-Sud
Universités Paris VI and VII
CEA
Université de Haute Alsace
CNRS/IN2P3
RWTH Aachen
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
Radboud University Nijmegen/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
Universität Zürich
Lancaster University
Imperial College
University of Manchester
University of Arizona
University of California
California State University
Florida State University
Fermi National Accelerator Laboratory
University of Illinois at Chicago
Northern Illinois University
Northwestern University
Indiana University
University of Notre Dame
Purdue University Calumet
Iowa State University
University of Kansas
Kansas State University
Louisiana Tech University
University of Maryland
Boston University
Northeastern University
University of Michigan
Michigan State University
University of Mississippi
University of Nebraska
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
Institución
Resumen
We report a measurement of the Λb0 lifetime using a sample corresponding to 1.3fb-1 of data collected by the D0 experiment in 2002-2006 during run II of the Fermilab Tevatron collider. The Λb0 baryon is reconstructed via the decay Λb0→μν̄Λc+X. Using 4437±329 signal candidates, we measure the Λb0 lifetime to be τ(Λb0)=1.290-0.110+0.119(stat)-0.091+0.087(syst)ps, which is among the most precise measurements in semileptonic Λb0 decays. This result is in good agreement with the world average value. © 2007 The American Physical Society.