HAL : in2p3-00003413, version 1
 Physics Letters B 405 (1997) 202-214
 Measurement of the Multiplicity of Gluons Splitting to Bottom Quark Pairs in Hadronic Z$^0$ Decays
 DELPHI Collaboration(s)
 (1997)
 An inclusive measurement of the average multiplicity of $b \bar b$ pairs from gluons, \gb, in hadronic $Z^0$ events collected by the DELPHI experiment at LEP, is presented. A counting technique, based on jet $b$-tagging in 4-jet events, has been used. Looking for secondary bottom production in events with production of any primary flavour, by requiring two $b$-tagged jets in well defined topological configurations, gave gb = (0.21 \pm 0.11(stat) \pm 0.09 (syst) )\%. This result was checked with a different method designed to select events with four $b$ quarks in the final state. Agreement within the errors was found.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
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 in2p3-00003413, version 1 http://hal.in2p3.fr/in2p3-00003413 oai:hal.in2p3.fr:in2p3-00003413 Contributeur : Sylvie Florès <> Soumis le : Vendredi 6 Novembre 1998, 13:55:46 Dernière modification le : Mercredi 21 Juin 2006, 16:17:26