Basic features of proton-proton interactions at ultra-relativistic energies and RFT-based quark-gluon string model

¹ Skobeltsyn Institute of Nuclear Physics, Moscow State University, RU-119991 Moscow, Russia
² Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway
³ National Research Nuclear University “MEPhI” (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow, RU-115409, Russia
⁴ Max-Planck-Institut für Intelligente Systeme, Heisenbergstr. 3, D-70569 Stuttgart, Germany
⁵ Institut für Augewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany

^a e-mail: eugen.zabrodin@fys.uio.no

Published online: 5 December 2017

Abstract

Proton-proton collisions at energies from √s = 200 GeV up to √s = 14 TeV are studied within the microscopic quark-gluon string model. The model is based on Gribov’s Reggeon Field Theory accomplished by string phenomenology. Comparison with experimental data shows that QGSM describes well particle yields, rapidity - and transverse momentum spectra, rise of mean 〈 pT 〉 and forward-backward multiplicity correlations. The latter arise in QGSM because of the addition of various processes with different mean multiplicities. The model also indicates fulfillment of extended longitudinal scaling and violation of Koba-Nielsen-Olesen scaling at LHC. The origin of both features is traced to short-range particle correlations in the strings. Predictions are made for √s = 14 TeV.