Improving extractions of|Vcb|andmbfrom the hadronic invariant mass moments of semileptonic inclusiveBdecay

Measurement of the moments of the hadronic invariant mass distribution in semileptonic B decays

m b from the Hadronic Invariant Mass Moments of Semileptonic Inclusive B decay

We calculate the hadronic tensor for inclusive semileptonic B → Xc l ν̄ decay to O(αs). This allows O(αs ΛQCD/mb) corrections to hadronic invariant mass observables to be directly evaluated with experimentally required cuts on phase space. Several moments of phenomenological interest are presented to order O(αs ΛQCD/mb) and O (

Hadronic mass moments in inclusive semileptonic B meson decays.

We have measured the first and second moments of the hadronic mass-squared distribution in B-->X(c)l nu, for P(lepton)>1.5 GeV/c. We find = 0.251+/-0.066 GeV(2), <(M(2)(X)-)(2)> = 0.576+/-0.170 GeV(4), where M macro(D) is the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b-->s gamma, we find the heavy qu...

Measurement of the First and Second Moments of the Hadronic Mass Distribution in Semileptonic B Decays

We report a preliminary measurement of the first and second moments of the hadronic mass distributions in B → Xc ν decays. The measurements are based on Υ (4S) → BB 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 threshold lepton momenta ranging from 0.9 to 1.6 GeV...

Improving Extractions of |vcb| and the B Quark Mass from Semileptonic Inclusive B Decay

Inclusive semileptonic B → Xc l ν̄ decay offers the opportunity to measure the CKM parameter |Vcb| and the bottom quark mass from experiment. . Experimental studies of moments of the differential decay spectra of B → Xc l ν̄ , combined with a measurement of the total inclusive decay rate, allow the extraction of these parameters to occur with high precision. The idea is that sufficiently inclusiv...