We estimate the heavy quark effective theory parameter λ1 from the inclusive semileptonic B-meson decay spectrum. By using recent CLEO double lepton tagging data of B→Xeν, which show the lepton momentum as low as 0.6 GeV, we extracted λ1∼-0.58 GeV2. We also derived Λ̄∼0.46 GeV and |Vcb|=0.041±0.002.
|Number of pages||6|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 1999 Jun 1|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)