Hadronic Mass Moments in Inclusive Semileptonic B Meson Decays
High Energy Physics - Experiment
2010-04-08 v3
Abstract
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 <M_X^2 - M_D[Bar]^2> = 0.251 +- 0.066 GeV^2, < (M_X^2 -<M_X^2>)^2 > = 0.576 +- 0.170 GeV^4, where M_D[Bar] 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 HQET parameter lambda_1 (MS[Bar], to order 1/M^3 and beta_0 alpha_s^2) to be -0.24 +- 0.11 GeV^2. Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain |V_cb| = 0.0404 +- 0.0013.
Cite
@article{arxiv.hep-ex/0108033,
title = {Hadronic Mass Moments in Inclusive Semileptonic B Meson Decays},
author = {D. Cronin-Hennessy and CLEO Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0108033},
year = {2010}
}
Comments
11 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, submitted to PRL