Study of time-dependent CP asymmetry in neutral BB decays to J/ψπ0J/\psi \pi^0

Research output: Contribution to journalResearch articleContributedpeer-review


  • Babar Collaboration - (Author)
  • Chair of Opto-Electronics
  • Department of Distributed and Data Intensive Computing (VDR)
  • Central Unit Faculty of Physics
  • TUD Dresden University of Technology
  • CAS - Institute of High Energy Physics
  • University of California at Berkeley
  • University of Birmingham
  • Ruhr University Bochum
  • University of California at Santa Cruz
  • California Institute of Technology
  • University of Colorado Boulder
  • Colorado State University
  • University of Edinburgh
  • University of Iowa
  • Iowa State University
  • Laboratoire de l’Accélérateur Linéaire
  • Royal Holloway University of London
  • University of Mississippi
  • Universite Paris 7
  • Princeton University
  • Commissariat à l'énergie atomique
  • Stanford Linear Accelerator Center (SLAC)
  • Stanford University
  • Albany State University
  • University of Wisconsin-Madison


We present the first study of the time-dependent CP-violating asymmetry in B0→J/ψπ0 decays using e+e− annihilation data collected with the BABAR detector at the Υ(4S) resonance during the years 1999–2002 at the PEP-II asymmetric-energy B Factory at SLAC. Using approximately 88×106 B¯¯¯B pairs, our results for the coefficients of the cosine and sine terms of the CP asymmetry are CJ/ψπ0=0.38±0.41(stat)±0.09(syst) and SJ/ψπ0=0.05±0.49(stat)±0.16(syst).


Original languageEnglish
Article number061802
Number of pages7
JournalPhysical review letters
Publication statusPublished - 2003

External IDs

Scopus 79961019699