Eur. Phys. J. C (2008) 54: 577-581
https://doi.org/10.1140/epjc/s10052-008-0554-1

Regular Article - Theoretical Physics

Midrapidity production of secondaries in pp collisions at RHIC and LHC energies in the quark–gluon string model

¹ Yerevan Physics Institute, Yerevan, Armenia
² Departamento de Física de Partículas, Facultade de Física, and Instituto Galego de Altas Enerxías (IGAE), Universidade de Santiago de Compostela, Galicia, Spain
³ Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188350, Russia

^* e-mail: merino@fpaxp1.usc.es

Received: 20 September 2007
Published online: 28 February 2008

Abstract

We consider the phenomenological implications of the assumption that baryons are systems of three quarks connected through a gluon string junction. The transfer of baryon number in rapidity space due to the string junction propagation is considered in detail. At high energies this process leads to a significant effect on the net baryon production in hN collisions at midrapidities. The numerical results for midrapidity inclusive densities of different secondaries in the framework of the quark–gluon string model are in reasonable agreement with the experimental data. One universal value, λ≃0.25, for the strangeness suppression parameter correctly describes the yield ratios of Λ/p, Ξ/Λ, and Ω/Ξ. The predictions for pp collisions at LHC energies are also presented.