The power-law relation between higher order and second order scaled factorial moments has been investigated for secondary particles produced in interactions of 800 GeV protons with emulsion nuclei in one-dimensional (pseudorapidity and azimuthal angle) and two-dimensional (pseudorapidity and azimuthal angle) spaces for three multiplicity intervals. The moment power law is found to be independent of multiplicity cuts and phase space dimension. A universal scaling exponent is determined which indicates that there is no second-order phase transition in the interactions. The ratios of higher-order anomalous fractal dimensions with respect to the second-order anomalous fractal dimension are well represented by the Lévy-stable distribution and give clear evidence of a self-similar cascading mechanism in the interactions.
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Experimental results on some characteristics of high multiplicity (≧45) proton-AgBr interactions at 800 GeV are presented. The results are compared with those in lower multiplicity regions as well as for CNO target. The various parameters investigated here are pseudorapidity distribution, mean normalised multiplicity, mean number of intranuclear collisions and normalised pseudorapidity.
NUCLEUS IS AgBr (NUMBER(HTRACK) >= 9).
NUCLEUS IS CNO (2 <= NUMBER(HTRACK) <= 5).
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In interactions of 800-GeV protons with emulsion nuclei, the multiplicity and rapidity distributions of charged secondary particles are studied. The existence of strong short-range correlations among the secondary particles is found. Evidence of independent emission of low-multiplicity clusters is presented.
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Topological cross sections and characteristics of charged particle multiplicity distributions for¯nn andnn interactions and¯nn annihilations at 6·1 GeV/c are presented. KNO-distributions for¯nn andnn interactions are very similar. Characteristics for¯nn and¯pp annihilations are identical at equal energies.
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InclusiveKs0, Λ and\(\bar \Lambda\)-production has been investigated in\(\bar p\)p-interactions at 22.4 GeV/c. Total and topological cross sections and multiplicity characteristics of neutral strange particles have been determined. DifferentialKs0 and Λ-cross sections and also characteristics of annihilation processes with neutral kaon production have been studied. It is shown that the difference of the shapes of the invariantx-distributions forK-mesons in the fragmentation region for annihilation and non-annihilation processes can be described in the framework of the “dual” valon model, but not by considering the current (undressed) quark recombination mechanisms only. The polarization of Λ and\(\bar \Lambda\)-hyperons has been measured.
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