We have measured the time-dependent decay rate for the process B-->J/psiK(*0)(892) in a sample of about 88x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/psiK(*0) or J/psi(K) over bar (*0) final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/psiK(*0) and J/psi(K) over bar (*0), find them to be consistent with the standard model expectations, and set upper limits at 90% confidence level (C.L.) on the decay amplitude ratios \A((B) over bar (0)-->J/psiK(*0))//\A(B-0-->J/psiK(*0))\<0.26 and \A(B-0-->J/psi(K) over bar (*0))\/\A((B) over bar (0)-->J/psi(K) over bar (*0))\<0.32. For a single ratio of wrong-flavor to favored amplitudes for B-0 and (B) over bar (0) combined, we obtain an upper limit of 0.25 at 90% C.L.

Bound on the ratio of decay amplitudes for (B)over-bar(0)-> J/psi K*(0) and B-0 -> J/psi K*(0) RID C-5223-2009 RID C-5719-2008 RID D-1055-2009 RID A-2675-2009

LUSIANI, Alberto;
2004

Abstract

We have measured the time-dependent decay rate for the process B-->J/psiK(*0)(892) in a sample of about 88x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/psiK(*0) or J/psi(K) over bar (*0) final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/psiK(*0) and J/psi(K) over bar (*0), find them to be consistent with the standard model expectations, and set upper limits at 90% confidence level (C.L.) on the decay amplitude ratios \A((B) over bar (0)-->J/psiK(*0))//\A(B-0-->J/psiK(*0))\<0.26 and \A(B-0-->J/psi(K) over bar (*0))\/\A((B) over bar (0)-->J/psi(K) over bar (*0))\<0.32. For a single ratio of wrong-flavor to favored amplitudes for B-0 and (B) over bar (0) combined, we obtain an upper limit of 0.25 at 90% C.L.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4866
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