Determination of HQET parameter \lambda_1 from Inclusive Semileptonic B   Meson Decay Spectrum
  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. 
K.K. Jeong (Yonsei Univ.), C.S. Kim (Yonsei Univ.)