https://doi.org/10.1051/epjconf/201716407015
Forward-backward multiplicity correlations in proton-proton collisions from several GeV to LHC energies
1
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: larissa.bravina@fys.uio.no
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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
