A measurement of the product branching ratio in decays
The OPAL Collaboration
G. Abbiendi 2 - et al.
2Dipartimento di Fisica dell' Università di Bologna and INFN, I-40126 Bologna, Italy
Received: 25 November 1998 / Published online: 27 April 1999
The product branching ratio, ,where denotes any weakly-decaying b-baryon, has been measured using the OPAL detector at LEP. 's are selected by the presence of energetic particles in bottom events tagged by the presence of displaced secondary vertices. A fit to the momenta of the particles separates signal from B meson and fragmentation backgrounds. The measured product branching ratio is
Combined with a previous OPAL measurement, one obtains