6 research outputs found

    Search for a Signal on QCD Critical Point in Central Nucleus-Nucleus Collisions

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    We discuss that the QCD critical point could appear in central collisions in percolation cluster. We suggest using the nuclear transparency effect and the one of the light nuclear production to identify the critical point.Comment: To appear in the proceedings of the 20th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2008), Jaipur, India, February 4-10, 200

    Some Properties of the Central pi--Meson Carbon Interactions at 40 Gev/C

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    We discuss some properties of the central pi--meson carbon reactions at 40 GeV/c. While these results were obtained many years ago they have not been explained completely. We attempt to interpret following: results regime change on the behavior of some characteristics of the events as a function of the centrality; anomaly peak on the angular distributions of the slow protons emitted in these reactions; charge asymmetry on the pi--mesons production in the back hemisphere in lcs. Understanding of the results could help to explain the new ones coming from the modern central experiments at high and ultrarelativistic energies.Comment: To appear in the proceedings of the 10th nternational Workshop on Meson Production, Properties and Interaction (MESON 2008), Krakow, Poland, 6 - 10 June 2008. 4 pages and 4 figure

    Production of

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    The production of Δ++ \Delta^{{++}}_{} and Δ0 \Delta^{0}_{} resonances on oxygen nuclei in 16O + p interactions at 3.25A GeV/c was investigated with 4π \pi acceptance. The masses and widths of the resonances were obtained from an analysis of the experimental and background invariant-mass distributions of pπ± \pi^{{\pm}}_{} pairs. The fractions of charged pions coming from Δ++ \Delta^{{++}}_{} and Δ0 \Delta^{0}_{} decay were estimated. The momentum, kinetic energy, and emission angle distributions of Δ++ \Delta^{{++}}_{} and Δ0 \Delta^{0}_{} resonances were reconstructed in the oxygen nucleus rest frame. The slope parameters, T0 , of the reconstructed spectra of invariant cross-sections of Δ++ \Delta^{{++}}_{} and Δ0 \Delta^{0}_{} resonances, produced on oxygen nuclei in 16O + p interactions at 3.25A GeV/c , were determined