K-Shell photodetachment of Li: Experiment and theory

D. Cronin-Hennessy, A. L. Lyon, S. Roberts, E. H. Thorndike, T. E. Coan, V. Fadeyev, Y. S. Gao, Y. Maravin, I. Narsky, R. Stroynowski, J. Ye, T. Wlodek, M. Artuso, K. Benslama, C. Boulahouache, K. Bukin, E. Dambasuren, G. Majumder, R. Mountain, T. SkwarnickiS. Stone, J. C. Wang, A. Wolf, S. Kopp, M. Kostin, A. H. Mahmood, S. E. Csorna, I. Danko, K. W. McLean, Z. Xu, R. Godang, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, G. J. Zhou, A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, A. J. Weinstein, D. E. Jaffe, R. Mahapatra, G. Masek, H. P. Paar, D. M. Asner, A. Eppich, Y. Kubota, R. Poling, CLEO Collaboration

Research output: Contribution to journalArticlepeer-review


We have measured the first and second moments of the hadronic mass-squared distribution in B→Xclv, for Plepton>1.5 GeV/c. We find(MX2−MD−2)= 0.251 ± 0.66 GeV2,((MX2−MX2)2)=0.576 ± 0.170 GeV4, where M¯Dis the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b→s γ, we find the heavy quark effective theory parameter λ1(in the modified minimal subtraction renormalization scheme, to order 1/MB3and γ0αs2) to be −0.24±0.11GeV2. Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain|Vcb|=0.0404±0.0013.

Original languageEnglish (US)
JournalPhysical review letters
Issue number25
StatePublished - Dec 3 2001


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