M.A. Braun

PERCOLATION APPROACH TO QUARK-GLUON PLASMA AND J/PSI SUPPRESSION

It is shown that the critical threshold for percolation of the overlapping strings exchanged in heavy ion collisions can naturally explain the sharp strong suppression of {ital J}/{psi} shown by the experimental data on central Pb-Pb collisions, which does not occur in central O-U and S-U collisions. {copyright} {ital 1996 The American Physical Society.}

Multiple production in the Monte Carlo string fusion model

The influence of the string fusion on the basic features of relativistic heavy-ion collisions is studied with the help of a Monte Carlo string fusion model. The model is based on the parton picture of strong interactions and includes the string fusion phenomenon. It is demonstrated that string fusion leads to a considerable reduction of particle production with a relative enhancement of the baryon component in AA collisions at ultra-relativistic energies

Percolation of strings and the relativistic energy data on multiplicity and transverse momentum distributions

The dependence of the multiplicity on the number of collisions and the transverse momentum distribution for central and peripheral Au-Au collisions are studied in the model of percolation of strings relative to the experimental conditions at RHIC. The comparison with the first RHIC data shows a good agreement.

Nuclear structure functions and heavy flavour leptoproduction off the nucleus at small x in perturbative QCD

Abstract. Nuclear structure functions and cross-sections for heavy flavour production in lepton–nucleus collisions are investigated in the low x region accessible now or in the near future. The scattering on a heavy nucleus is described by the sum of fan diagrams of BFKL pomerons, which is exact in the high-colour limit. The initial condition for the evolution at x=0.01 is taken from a saturation model, which reproduces the experimental data on the proton. The

A Probabilistic model of interacting strings

A

Correlations between multiplicities and average transverse momentum in the percolating color strings approach

dependence of the structure functions is well described by a power factor

Particle production in nuclear collisions and string interactions

A^\alpha

On the forward - backward correlations in a two stage scenario

, with

Strangeness enhancement and string fusion in nucleus-nucleus collisions

\alpha

String fusion and particle production at high energies: Monte-Carlo string fusion model

reaching values as low as 1/2 at extremely low x. The total cross-sections for heavy flavour production reach values of the order of mb, and the corresponding transverse momentum distributions are sizable up to transverse momenta larger than the initial large scale