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On multiplicity and transverse-momentum correlations in collisions of ultrarelativistic ions

  • Elementary Particles and Fields Theory
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Abstract

A theoretical description of long-range correlations between observables measured in separated rapidity intervals for nucleus-nucleus collisions at high energies is given. With allowance for an actual distribution of nucleons in nuclei, the p t n and nn correlation functions and respective correlation coefficients are calculated at various values of the impact parameter. It is shown that fluctuations of the impact parameter at a level of 1 fm, which are irremovable in experiments, affect the correlation coefficients substantially. It is shown that p t n correlations become much more pronounced upon going over from the SPS to the RHIC and LHC energies. The p t n and nn correlation functions calculated for the minimumbias case (that is, without selection in centrality) are compared with experimental data on PbPb collisions at the SPS energies.

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia

    V. V. Vechernin & R. S. Kolevatov

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  1. V. V. Vechernin
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  2. R. S. Kolevatov
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Correspondence to R. S. Kolevatov.

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Original Russian Text © V.V. Vechernin, R.S. Kolevatov, 2007, published in Yadernaya Fizika, 2007, Vol. 70, No. 10, pp. 1846–1857.

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Vechernin, V.V., Kolevatov, R.S. On multiplicity and transverse-momentum correlations in collisions of ultrarelativistic ions. Phys. Atom. Nuclei 70, 1797–1808 (2007). https://doi.org/10.1134/S1063778807100158

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  • DOI: https://doi.org/10.1134/S1063778807100158

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