MEASUREMENT OF THE INCLUSIVE ELECTRON SPECTRUM IN CHARMLESS SEMILEPTONIC B DECAYS NEAR THE KINEMATIC ENDPOINT.

Download or read book MEASUREMENT OF THE INCLUSIVE ELECTRON SPECTRUM IN CHARMLESS SEMILEPTONIC B DECAYS NEAR THE KINEMATIC ENDPOINT. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary result on the study of the inclusive electron spectrum in B[yields] X[sub u]e[nu] decays above the kinematic limit for the dominant B[yields] X[sub c]e[nu] transitions is presented. This study is performed at the PEP-II asymmetric B Factory, where B meson pairs are produced in the decay of the[Upsilon](4S) resonance. For the electron momentum range of 2.3-2.6 GeV/c in the[Upsilon](4S) rest frame, the partial branching ratio is measured to be[Delta][Beta](B[yields] X[sub u]e[nu])= (0.152[+-] 0.014[+-] 0.014)[center-dot] 10[sup -3].