The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 1 Issue 3/4 (1998) pp 523-529

theoretical physics:
Radiatively corrected semileptonic spectra in B meson decays

Changhao Jin (1), Emmanuel A. Paschos (2)

(1) Sektion Physik, Universität München, Theresienstrasse 37, D-80333 München, Germany (e-mail: jin@photon.hep.physik.uni-muenchen.de)
(2) Institut für Theoretische Physik, Universität Dortmund, D-44221 Dortmund, Germany

Received: 9 April 1997 / Revised version: 27 May 1997

Abstract. We show how radiative QCD corrections calculated in terms of quarks can be incorporated at the hadron level in inclusive semileptonic $B$-meson decays. The bound state effects are described by a momentum distribution function of the $b$ quark. The summation over the final states and the averaging over the momentum distribution of the decaying quark render the radiative corrections finite. With this coherent formalism we investigate the shape of the electron spectra for $b\to u$ and $b\to c$ decays as a function of the parameters of the theory. The resultant $b\to c$ electron energy spectrum is in agreement with the experimental data.

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Online publication: February 5, 1998
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