TY - JOUR

T1 - Multi-pomeron exchange model for pp and pp collisions at ultra-high energy

AU - Bodnia, Evgeniia

AU - Derkach, Denis

AU - Feofilov, Grigory

AU - Kovalenko, Vladimir

AU - Puchkov, Andrey

N1 - Conference code: 21

PY - 2013

Y1 - 2013

N2 - A new variant of the effective pomeron exchange model is proposed for the description of the correlation, observed in pp and pp collisions at center-of-mass energy from SPS to LHC, between mean transverse momentum and charged particles multiplicity. The model is based on the Regge- Gribov approach. Smooth logarithmic growth with the collision energy was established for the parameter k, the mean rapidity density of charged particles produced by a single string. It was obtained in the model by the fitting of the available experimental data on charged particles rapidity density in pp and pp collisions. The main effect of the model, a gradual onset of string collectivity with the growth of collision energy, is accounted by a free parameter b that is responsible in an effective way for the string fusion phenomenon. Another free parameter, t, is used to define string tension. We extract parameters β and t from the available experimental results on pt- multiplicity correlation at nucleon collision energy p s from 17 GeV to 7 TeV. Smooth dependence of both β and t on energy allows to make predictions for the correlation behavior at the collision energy of 14 TeV. The indications to the string interaction effects in high multiplicity events in pp collisions at the LHC energies are also discussed.

AB - A new variant of the effective pomeron exchange model is proposed for the description of the correlation, observed in pp and pp collisions at center-of-mass energy from SPS to LHC, between mean transverse momentum and charged particles multiplicity. The model is based on the Regge- Gribov approach. Smooth logarithmic growth with the collision energy was established for the parameter k, the mean rapidity density of charged particles produced by a single string. It was obtained in the model by the fitting of the available experimental data on charged particles rapidity density in pp and pp collisions. The main effect of the model, a gradual onset of string collectivity with the growth of collision energy, is accounted by a free parameter b that is responsible in an effective way for the string fusion phenomenon. Another free parameter, t, is used to define string tension. We extract parameters β and t from the available experimental results on pt- multiplicity correlation at nucleon collision energy p s from 17 GeV to 7 TeV. Smooth dependence of both β and t on energy allows to make predictions for the correlation behavior at the collision energy of 14 TeV. The indications to the string interaction effects in high multiplicity events in pp collisions at the LHC energies are also discussed.

UR - http://www.scopus.com/inward/record.url?scp=84999219571&partnerID=8YFLogxK

M3 - Conference article

VL - 2013-January

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 60

T2 - International Workshop High Energy Physics and Quantum Field Theory

Y2 - 23 June 2013 through 30 June 2013

ER -