Measurement of the Ratio of Decay Amplitudes for B0bar -> J/psi K*0 and B0 -> J/psi K*0

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dc.creatorAubert, B.
dc.creatorCollaboration, BABAR
dc.date2004-04-03
dc.date.accessioned2026-07-07T11:57:50Z
dc.date.available2026-07-07T11:57:50Z
dc.descriptionWe have measured the time-dependent decay rate for the process $B \to J/ψK^{*0}(892)$ in a sample of about 88 million $Υ(4S) \to B\bar{B}$ 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 $J/ψK^{*0}$ or $J/ψ\bar{K}^{*0}$ final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for $J/ψK^{*0}$ and $J/ψ\bar{K}^{*0}$, find them to be consistent with the Standard Model expectations, and set upper limits at 90% C.L. on the decay amplitude ratios $|A (\bar{B}^0 \to J/ψK^{*0})|/|A (B^0 \to J/ψK^{*0})| < 0.26$ and $|A (B^0 \to J/ψ\bar{K}^{*0})|/|A (\bar{B}^0 \to J/ψ\bar{K}^{*0})| <0.32$. For a single ratio of wrong-flavor to favored amplitudes for $B^0$ and $\bar{B}^0$ combined, we obtain an upper limit of 0.25 at 90% C.L.
dc.description6 pages, 2 postscript figures, submitted to Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/hep-ex/0404005
dc.identifierhttp://arxiv.org/abs/hep-ex/0404005
dc.identifierPhys.Rev.Lett.93:081801,2004
dc.identifierdoi:10.1103/PhysRevLett.93.081801
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206021
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of the Ratio of Decay Amplitudes for B0bar -> J/psi K*0 and B0 -> J/psi K*0
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