Hadronic Spectral Moments in Semileptonic B Decays With a Lepton Energy Cut

Details Hadronic Spectral Moments in Semileptonic B Decays With a Lepton Energy Cut Hadronic Spectral Moments in Semileptonic B Decays With a Lepton Energy Cut

1997-08-12

arxiv.org/abs/hep-ph/9708327v1

Phys.Rev. D57 (1998) 424-430

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 5 figures, REVTeX

Scientific paper

10.1103/PhysRevD.57.424

We compute the first two moments of the final hadronic invariant mass in inclusive semileptonic B decay, in the presence of a cut on the charged lepton energy. These moments may be measured directly by experiments at the Upsilon(4S) using the neutrino reconstruction technique, which requires such a cut. Measurement of these moments will place constraints on the nonperturbative parameters \bar\Lambda and \lambda_1, which are relevant for extracting the quark masses m_b and m_c, as well as the CKM angle V_cb. We include terms of order \alpha_s^2\beta_0 and 1/m_b^3 in the operator product expansion, and use the latter to estimate the theoretical uncertainty in the extraction of \bar\Lambda and \lambda_1.

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