Two particle rapidity correlations among produced particles in proton-nucleus interactions at high energies

A study of inelastic interactions of deuterons and alphas in an emulsion at ?3.6 GeV/nucleon

“…at fixed n~, n~ and nb) one-particle spectra; (iii) multiplicity distributions coincide with the empirical spectra for all groups studied. It was shown earlier [16] correlations between the target fragments (see the values of correlators at z 1 = z2) contradicts the hypothesis that the nuclear shock waves are formed in interactions of deuterons and alpha particles with emulsion nuclei at energies considered. The same conclusion has been drawn for collisions of nitrogen ions in emulsion at 2.1 GeV/n [15].…”

Justification of Landau Hydrodynamic-Tube model in central relativistic heavy-ion collisions

“…We have verified empirically the results of application of the statistical approach based on parametrically invariant quantities g 1 and g 2 to the conditions of our experiments. In order to do so we have used ensembles of Monte Carlo events generated following the phenomenological model of independent emission of s-particles (IEM) [26,27]. In the framework of this model we assume that: (i) multiplicity (n s ) distributions of simulated events reproduce the experimental distributions for the interactions considered; (ii) one-particle pseudorapidity distributions of s-particles in each one of simulated subensembles of events (within, for instance, the fixed range of n s ) reproduce the experimental distribution for the same range of n s ; (iii) emission angles of s-particles in each one of simulated events are statistically independent.…”

Study of multiplicity and the pseudorapidity correlation in the forward and backward hemisphere for pions and protons emitted in a 12C – emulsion interaction at 4.5 A ∙ GeV/c

“…It may be noted that this method has been successfully applied earlier for hadron-nucleus (3) and nucleus-nucleus (4) interactions. Gulamov et al (5) have compared correlation functions (C) calculated from inclusive ensembles of random events generated according to the method adopted here, i.e., the independent emission model (IEM), with the correlation function generated according to the cylindrical phase space model (CPSM) (which gives the contribution of correlations due to kinematics); they observed that conservation laws led to an increase of long-range and a decrease of shortrange correlations. Therefore, any observation of an excess of short-range correlations over the predictions of the IEM indicates the presence of a dynamical effect that cannot be explained by the conservation laws.…”