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S. Hegyi

Publications and source records attributed to S. Hegyi.

21 records · Page 2Linked to original sources

Remarks on Koba-Nielsen-Olesen Scaling

It is shown that there is a second properly normalized KNO scaling function, $nP_n(n/\bar n)=φ(z)$, which has certain advantages in the analysis of KNO scaling. First, the $nP_n$ are not influenced by the statistical and systematic uncertainties of $\bar n$ hence $φ(z)$ provides more selective power than the original KNO scaling function $\bar nP_n(n/\bar n)=ψ(z)$. Second, the new scaling function generates scale parameter $σ=1$ since it depends only on the combination of $z$ and the scale parameter of $ψ(z)$. An analysis of $φ(z)$ is given using $e^+e^-$ annihilation data for charged particle multiplicity distributions.

hep-ph↗

Scaling Laws in Hierarchical Clustering Models with Poisson Superposition

Properties of cumulant- and combinant ratios are studied for multihadron final states composed of Poisson distributed clusters. The application of these quantities to ``detect'' clusters is discussed. For the scaling laws which hold in hierarchical clustering models (void scaling, combinant scaling) a generalization is provided. It is shown that testing hierarchical models is meaningful only for phase-space volumes not larger than the characteristic correlation length introduced by Poisson superposition. Violation of the scaling laws due to QCD effects is predicted.

hep-ph↗

Monofractal Density Fluctuations and Scaling Laws for Count Probabilities and Combinants

The relation of combinants to various statistics characterizing the fluctuation pattern of multihadron final states is discussed. Scaling laws are derived for count probabilities and combinants in the presence of homogeneous and clustered monofractal density fluctuations. It is argued that both types of scaling rules are well suited to signal Quark-Gluon Plasma formation in a second-order QCD phase transition.

hep-ph↗