The European Physical Journal C

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

Table of Contents

Abstract Volume 2 Issue 3 (1998) pp 545-556
DOI 10.1007/s100529800702

theoretical physics:
Exclusive ${J/\psi}$ and ${\psi'}$ decays into baryon-antibaryon pairs

Jan Bolz (*), Peter Kroll

Fachbereich Physik, University of Wuppertal, D-42097 Wuppertal, Germany (e-mail: kroll@theorie.physik.uni-wuppertal.de)

Received: 10 March 1997 / Revised version: 18 June 1997 / Published online: 20 February 1998

Abstract. Within a perturbative approach we investigate decays of charmonium states into baryon-antibaryon pairs. Using a recently proposed wave function for the nucleon and suitable generalizations of it to the hyperons and decouplet baryons, we obtain the decay widths for the $B\overline B$ channels in reasonable agreement with data. An important difference to previous work is the use of the $c$-quark mass in the perturbative calculation instead of the charmonium mass. As a consequence of this feature our approach possesses the property that the $J/\psi$ and the $\psi'$ decay widths do not scale with a high power of the ratio of their masses.

(*) Supported by Deutsche Forschungsgemeinschaft

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Online publication: April 25, 1998
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