Determination of HQET parameter λ_1 from Inclusive Semileptonic B Meson Decay Spectrum
arXiv:hep-ph/9811475 · doi:10.1103/PhysRevD.59.114019
Abstract
We estimate the heavy quark effective theory parameter λ_1 from inclusive semileptonic B-meson decay spectrum. By using recent CLEO double lepton tagging data of B -> X e nu, which shows the lepton momentum as low as 0.6 GeV, we extracted λ_1 \sim -0.58 GeV^2. We also derived \barΛ\sim 0.46 GeV and |V_{cb}| = 0.041 \pm 0.002.
13 pages, 3 figures, LaTeX. Typos are corrected, and added one comment