Forward-backward multiplicity correlations in proton-proton collisions from several GeV to LHC energies
Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway
2 Max-Planck-Institut für Intelligente Systeme, Heisenbergstr. 3, D-70569 Stuttgart, Germany
3 Institut für Augewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany
4 Skobeltsyn Institute of Nuclear Physics, Moscow State University, RU-119991 Moscow, Russia
5 National Research Nuclear University “MEPhI” (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow, RU-115409, Russia
a e-mail: email@example.com
Published online: 5 December 2017
Forward-backward multiplicity correlations in pp collisions at LHC energies are studied with the quark-gluon string model. Comparison with experimental data and with model calculations for lower energies is performed. The model correctly reproduces the linear slope of the correlations, 〈nB(nF)〉 = a + bcorrnF, in the whole energy interval. Positive correlations arise because of mixing of sub-processes with different mean multiplicities. The increase of bcorr with rising collision energy is linked to the increase of the variety of sub-processes going via the soft and hard multi-Pomeron exchanges. For the events with fixed amount of Pomerons the correlation slope bcorr is shown to be essentially zero.
© The Authors, published by EDP Sciences, 2017
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