We report a measurement of the CP-violation parameter sin2β with B0→J/ψKS0 decays in which the J/ψ decays to hadrons or to muons that do not satisfy our standard identification criteria. With a sample of 88 million BB̅ events collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, we reconstruct 100±17 such events, with J/ψ⃗π+π-π0 being the most prevalent, and measure sin2β=1.56±0.42(stat)±0.21(syst).
Measurement of sin2β with hadronic and previously unused muonic J/ψ decays
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004
Abstract
We report a measurement of the CP-violation parameter sin2β with B0→J/ψKS0 decays in which the J/ψ decays to hadrons or to muons that do not satisfy our standard identification criteria. With a sample of 88 million BB̅ events collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, we reconstruct 100±17 such events, with J/ψ⃗π+π-π0 being the most prevalent, and measure sin2β=1.56±0.42(stat)±0.21(syst).
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