Determination of HQET parameter λ1 from Inclusive Semileptonic B Meson Decay Spectrum
نویسنده
چکیده
We estimate the heavy quark effective theory parameter λ1 from inclusive semileptonic B-meson decay spectrum. By using recent CLEO double lepton tagging data of B → Xeν, which shows the lepton momentum as low as 0.6 GeV, we extracted λ1 ∼ −0.58 GeV. We also derived Λ ∼ 0.46 GeV and |Vcb| = 0.041 ± 0.002. [email protected] [email protected], http://phya.yonsei.ac.kr/ ̃cskim/
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