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Measurements of moments of the hadronic mass distribution in semileptonic B decays


We report a measurement of the first four moments of the hadronic mass distribution in [Formula Presented] decays. The measurements are based on 89 million [Formula Presented] events where the hadronic decay of one of the B mesons is fully reconstructed and a charged lepton from the decay of the other B meson is identified. The moments are presented for minimum lepton momenta ranging from 0.9 to 1.6 GeV in the B rest frame. It is expected that such measurements will lead to improved determinations of [Formula Presented] and [Formula Presented] © 2004 The American Physical Society.

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