Artículos de revistas
Measurement of the semileptonic charge asymmetry in B0 meson mixing with the D0 detector
Fecha
2012-10-26Registro en:
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 86, n. 7, 2012.
1550-7998
1550-2368
10.1103/PhysRevD.86.072009
2-s2.0-84868018747
2-s2.0-84868018747.pdf
Autor
Centro Brasileiro de Pesquisas Físicas (CBPF)
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Federal do ABC (UFABC)
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 (ITEP)
Moscow State University
Institute for High Energy Physics
Petersburg Nuclear Physics Institute
Institut de Física d'Altes Energies (IFAE)
Uppsala University
Lancaster University
Imperial College London
University of Manchester
University of Arizona
University of California, Riverside (UCR)
Florida State University
Fermi National Accelerator Laboratory
University of Illinois at Chicago
Northern Illinois University
Northwestern University (NU)
Indiana University
Purdue University Calumet
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Kansas State University
Louisiana Tech University
Northeastern University
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Michigan State University
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Brookhaven National Laboratory
Langston University
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Augustana College
University of Liverpool
UPIITA-IPN
DESY
SLAC
University College London
Centro de Investigacion en Computacion - IPN
Universidad Autonoma de Sinaloa
Universidade Estadual Paulista (Unesp)
Université de Lyon
Institución
Resumen
We present a measurement of the semileptonic mixing asymmetry for B0 mesons, asld, using two independent decay channels: B0→μ +D -X, with D -→K +π -π -; and B0→μ +D *-X, with D * -→D ̄0π -, D ̄0→ K +π - (and charge conjugate processes). We use a data sample corresponding to 10.4fb -1 of pp̄ collisions at √s=1.96TeV, collected with the D0 experiment at the Fermilab Tevatron collider. We extract the charge asymmetries in these two channels as a function of the visible proper decay length of the B0 meson, correct for detector-related asymmetries using data-driven methods, and account for dilution from charge-symmetric processes using Monte Carlo simulation. The final measurement combines four signal visible proper decay length regions for each channel, yielding asld=[0.68±0.45(stat)±0.14(syst)]%. This is the single most precise measurement of this parameter, with uncertainties smaller than the current world average of B factory measurements. © 2012 American Physical Society.