Intermittency via moments and distributions in central O+Cu collisions at 14.6 A·GeV/c

Fluctuations in pseudorapidity distributions of charged particles from central (ZCAL) collisions of 16O+Cu at 14.6 A·GeV/c have been analyzed by Ju Kang using the method of scaled factorial moments as a function of the interval δη an apparent power-law growth of moments with decreasing interval is observed down to δη ∼ 0.1, and the measured slope parameters are found to obey two scaling rules. Previous experience with ET distributions suggested that fluctuations of multiplicity and transverse energy can be well described by Gamma or Negative Binomial Distributions (NBD) and excellent fits to NBD were obtained in all δη bins. The k parameter of the NBD fit was found to increase linearly with the δη interval, which due to the well known property of the NBD under convolution, indicates that the multiplicity distributions in adjacent bins of pseudorapidity δη ∼ 0.1 are largely statistically independent