Hadron production in q and q-bar jets

摘要

We present a number of jet fragmentation measurements in e~+e~- → hadrons. The ALEPH collaboration measures inclusive ρ~0 (770), f_0(980) and f_2(1270) production rates, improving the world averages. The SLD collaboration measures π~±, K~± and p/p-bar production in light-, c- and b-flavor Z~0 decays, as well as leading hadrons in light-quark jets, precisely. The DELPHI collaboration measures the average charged multiplicity in light- and b-flavor events at 183 and 189 GeV, verifying a precise prediction of QCD and excluding flavor-independent fragmentation.