Determination of HQET parameter λ_1 from Inclusive Semileptonic B Meson Decay Spectrum

Details Determination of HQET parameter λ_1 from Inclusive Semileptonic B Meson Decay Spectrum Determination of HQET parameter λ_1 from Inclusive Semileptonic B Meson Decay Spectrum

1998-11-26

arxiv.org/abs/hep-ph/9811475v2

Phys.Rev.D59:114019,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures, LaTeX. Typos are corrected, and added one comment

Scientific paper

10.1103/PhysRevD.59.114019

We estimate the heavy quark effective theory parameter \lambda_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 \lambda_1 \sim -0.58 GeV^2. We also derived \bar\Lambda
\sim 0.46 GeV and |V_{cb}| = 0.041 \pm 0.002.

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