2 00 3 Simple Cellular Model of Long - Range Multiplicity and p t Correlations in High - Energy Nuclear Collisions
نویسندگان
چکیده
A simple cellular model for the description of the long-range multiplicity and p t correlations in high-energy nuclear collisions originating from the string fusion model is proposed. Three versions of the model: without fusion, with local and with global string fusion are formulated. A Gauss approximation which enables explicit analytical calculations of the correlation functions in some asymptotic cases in the framework of the model is developed. The assumptions of the model and the validity of a Gauss approximation are checked up in the simplest (no fusion) case when the explicit solution of the model can be found. The role of the size of cells is anylised. The modification of the results in the case of non-Poissonian distributions is also discussed.
منابع مشابه
ar X iv : h ep - p h / 03 05 13 6 v 1 1 3 M ay 2 00 3 Cellular Approach to Long - Range p t and Multiplicity Correlations in the String Fusion Model
The long-range p t and multiplicity(n) correlations in high-energy nuclear collisions are studied in the framework of a simple cellular analog of the string fusion model. Two cases with local and global string fusion is considered. The p t –n and n–n correlation functions and correlation coefficients are calculated analytically in some asymptotic cases using suggested Gauss approximation. It's ...
متن کاملar X iv : h ep - p h / 03 07 05 6 v 1 4 J ul 2 00 3 Correlations between multiplicities and average transverse momentum in the percolating colour strings approach
Long range correlations multiplicity-multiplicity, p 2 T-multiplicity and p 2 − p 2 T are studied in the percolating colour string picture under different assumptions of the dynamics of string interaction. It is found that the strength of these correlations is rather insensitive to these assumptions nor to the geometry of formed fused string clusters. Both multiplicity-multiplicity and p 2 T-mu...
متن کامل2 00 8 STAR ’ s measurement of Long - range forward - backward multiplicity correlations as the signature of “ dense partonic matter ” in the Heavy
Forward-backward multiplicity correlations have been measured with the STAR detector for Au+Au, Cu+Cu and p+p collisions at √ sNN = 200 GeV. A strong, long-range correlation is observed for central heavy ion collisions that vanishes in semiperipheral events and pp collisions. There is no apparent scaling of correlation strength with the number of participants involved in the collision. Both the...
متن کاملForward-Backward Multiplicity Correlations in Relativistic Heavy-Ion Collisions
Forward-backward multiplicitycorrelations are investigated by analyzing the experimental data on O-AgBr collisions at 14.5A, 60A and 200A GeV/c and the findings are compared with the predictions of Monte Carlo model, hIJING. the findings indicate that the observed correlations are mainly of short-range in nature which arise due to the decay of clusters and (or) resonances produced in the centra...
متن کاملProbing novel long-range correlation phenomena in pPb collisions with identified particles at CMS
Observation of a long-range near-side two-particle correlation (known as the Ridge) in high-multiplicity pp and pPb collisions opened up new opportunities of exploring novel QCD dynamics in small collision systems. To further investigate the origin of this phenomenon, studies of two-particle correlations with identified K s and Lambda trigger particles in 5.02 TeV pPb collisions are presented, ...
متن کامل