Liu Lianshou

Self-affine scaling from non-integer phase-space partition in π+p and K+p collisions at 250 GeV/c

A factorial-moment analysis with real (integer and non-integer) phase space partition is applied to π+p and K+p collisions at 250 GeV/c. Clear evidence is shown for self-affine rather than self-similar power-law scaling in multiparticle production. The three-dimensional self-affine second-order scaling exponent is determined to be 0.061±0.010. a Supported by the Government of the Republic of Armenia, contractnumber 94-496 b Permanent address: Department of Physics, Jingzhou Teacher’s College, Hubei 434100, China c Onderzoeksdirecteur NFWO, Belgium d Supported by the Polish State Committee for Scientific ResearchAbstract A factorial-moment analysis with real (integer and non-integer) phase space partition is applied to π + p and K + p collisions at 250 GeV/ c . Clear evidence is shown for self-affine rather than self-similar power-law scaling in multiparticle production. The three-dimensional self-affine second-order scaling exponent is determined to be 0.061±0.010.

Examining the crossover from the hadronic to partonic phase in QCD.

It is argued that, due to the existence of two vacua — perturbative and physical — in QCD, the mechanism for the crossover from hadronic to partonic phase is hard to construct. The challenge is: how to realize the transition between the two vacua during the gradual crossover of the two phases. A possible solution of this problem is proposed and a mechanism for crossover, consistent with the principle of QCD, is constructed. The essence of this mechanism is the appearance and growing up of a kind of grape-shape perturbative vacuum inside the physical one. A dynamical percolation model based on a simple dynamics for the delocalization of partons is constructed to exhibit this mechanism. The crossover from hadronic matter to sQGP as well as the transition from sQGP to wQGP in the increasing of temperature is successfully described by using this model with a temperature dependent parameter.

Scaling exponents and fluctuation strength in high energy collisions

Abstract The information on dynamical fluctuations that can be extracted from the anomalous scaling observed recently in hadron-hadron collision experiments is discussed in some detail. A parameter “effective fluctuation strength” is proposed to estimate the strength of dynamical fluctuations. The method for extracting its value from the experimentally observed quantities is given. Some examples for the application of this method to real experimental data are presented.

Qualitative difference between the dynamics of particle production in soft and hard processes of high energy collisions

The qualitative difference between the anomalous scaling properties of hadronic final states in soft and hard processes of high-energy collisions is studied in some detail. It is pointed out that the experimental data of

A Monte Carlo study on the identification of quark and gluon jets

{e}^{+}{e}^{\ensuremath{-}}

A Monte Carlo study of erraticity behavior in nucleus nucleus collisions at high energies

collisions at

Monte Carlo analysis of the Lévy stability and multi-fractal spectrum in e+e- collisions

{E}_{\mathrm{c}.\mathrm{m}.}=91.2 \mathrm{GeV}

The power spectrum of anomalous scaling in a high-energy e+?e? collision and double-Hurst- exponent fractal

from DELPHI indicate that the dynamical fluctuations in

Effect of an equilibrium phase transition on multiphase transport in relativistic heavy ion collisions

{e}^{+}{e}^{\ensuremath{-}}

Comparison of different methods in the study of dynamical fluctuations in high energy e + e − collisions

collisions are isotropical, in contrast with the anisotropical fluctuations oberserved in hadron-hadron collision experiments. This assertion is confirmed by the Monte Carlo simulation using the JETSET 7.4 event generator.