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- W2010709491 abstract "We present a measurement of the branching fraction for the rare decays B→ρeν and extract a value for the magnitude of Vub, one of the smallest elements of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for five different calculations of form factors used to parametrize the hadronic current in semileptonic decays. Using a sample of 55×106 BB¯ meson pairs recorded with the BABAR detector at the PEP-II e+e− storage ring, we obtain B(B0→ρ−e+ν)=(3.29±0.42±0.47±0.55)×10−4 and |Vub|=(3.64±0.22±0.25−0.56+0.39)×10−3, where the uncertainties are statistical, systematic, and theoretical, respectively.Received 27 December 2002DOI:https://doi.org/10.1103/PhysRevLett.90.181801©2003 American Physical Society" @default.
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