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Hadronic Mass Moments in B -> X_c l nu Decays

Belle Collaboration
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Abstract

We report measurements of the first and second moments of the hadronic invariant mass squared distribution, and <(M^2_X- )^2>, in B -> X_c l nu decays for minimum lepton momenta ranging from 0.7 to 1.5 GeV/c in the B meson rest frame. The measurement uses BBbar events in which the hadronic decay of one B meson is fully reconstructed and the semileptonic decay of the other B is inferred from the presence of an identified lepton. These results are obtained from a 140 fb^-1 data sample collected near the Y(4S) resonance with the Belle detector at the KEKB asymmetric energy e^+e^- collider.

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Belle Collaboration. 2005-09-10. Hadronic Mass Moments in B -> X_c l nu Decays. https://arxiv.org/abs/hep-ex/0509013

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