A sample of events enriched in <b(b)over bar> quark pairs was selected in the data recorded by the DELPHI experiment at LEP during 1992 and 1993, by the presence of secondary decay vertices from short-lived particles. Using this sample, the average multiplicities of K-S(0), K-+/-, p((p) over bar), Lambda(<(Lambda)over bar>) and of charged particles in <b(b)over bar> events have been measured, distinguishing the component from fragmentation and the component coming from the decay of b-hadrons. The measurement of the average charge multiplicity in <b(b)over bar> events was used to compute the mean fractional beam energy carried by the primary b-hadron, and the difference in charged particle multiplicity between <b(b)over bar> events and light quark (<u(u)over bar>, <d(d)over bar>, <s(s)over bar>) events.

Production of Charged-particles, K-s(0),k+/-, P and Lambda In Z-]b(b)over-bar Events and In the Decay of B-hadrons

BIANCHI, Fabrizio;MIGLIORE, Ernesto;ROMERO, Alessandra;
1995-01-01

Abstract

A sample of events enriched in quark pairs was selected in the data recorded by the DELPHI experiment at LEP during 1992 and 1993, by the presence of secondary decay vertices from short-lived particles. Using this sample, the average multiplicities of K-S(0), K-+/-, p((p) over bar), Lambda(<(Lambda)over bar>) and of charged particles in events have been measured, distinguishing the component from fragmentation and the component coming from the decay of b-hadrons. The measurement of the average charge multiplicity in events was used to compute the mean fractional beam energy carried by the primary b-hadron, and the difference in charged particle multiplicity between events and light quark (, , ) events.
1995
347
447
466
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