Study of the Absolute Branching Fraction of Upsilon(4S) to anti-B^0 B^0 with Partial Reconstruction of anti-B^0 to D^{*+} lepton^- anti-nu

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37668Based on a data sample of 81.7 fb^-1 collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we present the current status of the measurement of the branching fraction of Upsilon(4S) to B0bar B^0. Our study of the decay was performed through the exclusive decays B0bar to D^{*+} \ell^{-} barν_{\ell} using a partial reconstruction method, where the D^{*+} is detected only through the soft pion daughter from the decay D^{*+} to D^{0} pi^{+}.LaTeX, 10 pages, 7 figures, DPF2003, PhiladelphiaHigh Energy Physics - ExperimentStudy of the Absolute Branching Fraction of Upsilon(4S) to anti-B^0 B^0 with Partial Reconstruction of anti-B^0 to D^{*+} lepton^- anti-nu_{lepton} at BABARtext