Local multiplicity fluctuations in Z decay

Local multiplicity fluctuations of hadrons produced in the decay of Z^0 were studied on the basis of L3 data. In addition to the normalized-factorial-moment method, the fluctuations were studied for the first time by the use of bunching parameters. A strong multifractal structure was observed inside jets. JETSET 7.4 PS describes the fluctuations in the azimuthal angle defined with respect to the beam axis reasonably well. For the fluctuations in rapidity, defined with respect to the thrust axis and in the four-momentum-difference variable, JETSET 7.4 PS overestimates the fluctuations.