Hadronic mass moments in inclusive semileptonic B meson decays.

Journal article

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 quark effective theory parameter lambda(1) (in the modified minimal subtraction renormalization scheme, to order 1/M(3)(B) and beta(0)alpha(2)(s)) to be -0.24+/-0.11 GeV(2). Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain absolute value of V(cb) = 0.0404+/-0.0013.

Authors: Cronin-Hennessy, D; Lyon, A; Roberts, S; Thorndike, E; Coan, T

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 87
• Issue: 25
• Pages: 251808
• Publication date: 2001-12-01
• DOI: 10.1103/physrevlett.87.251808
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: CLEO Collaboration