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A study of time-dependent CP-violating asymmetries in B0->J/psiK0S and B0->psi(2S)K0S decays [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 2000.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
vp : digital, PDF file
Additional Creators
Stanford Linear Accelerator Center, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We present a preliminary measurement of time-dependent CP-violating asymmetries in B° → J/ψ K{sub S}° and B° → ψ(2S)K{sub S}° decays recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The data sample consists of 9.0 fb⁻¹ collected at the Υ(4S) resonance and 0.8 fb⁻¹ off-resonance. One of the neutral B mesons, produced in pairs at the Υ(4S), is fully reconstructed. The flavor of the other neutral B meson is tagged at the time of its decay, mainly with the charge of identified leptons and kaons. A neural network tagging algorithm is used to recover events without a clear lepton or kaon tag. The time difference between the decays is determined by measuring the distance between the decay vertices. Wrong-tag probabilities and the time resolution function are measured with samples of fully-reconstructed semileptonic and hadronic neutral B final states. The value of the asymmetry amplitude, sin2β, is determined from a maximum likelihood fit to the time distribution of 120 tagged B° → J/ψ K{sub S}° and B° → ψ(2S) K{sub S}° candidates to be sin2β = 0.12 ± 0.37(stat) ± 0.09(syst) (preliminary).
Report Numbers
E 1.99:slac-pub-8540
slac-pub-8540
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
10/16/2000.
"slac-pub-8540"
Barrera, Barbara.
Type of Report and Period Covered Note
Topical;
Funding Information
AC03-76SF00515
View MARC record | catkey: 14712560