Original scientific paper

On hadron production from the quark-gluon plasma phase in ultra-relativistic heavy-ion collisions

A. Ya. Berdnikov ; Department of Nuclear Physics, State Polytechnical University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian Federation
Ya. A. Berdnikov ; Department of Nuclear Physics, State Polytechnical University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian Federation; State Technical University, Department of Nuclear Physics, 195251 St. Petersburg, Russian Federation
A. N. Ivanov ; Department of Nuclear Physics, State Polytechnical University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian Federation; Atomic Institute of the Austrian Universities and Vienna University of Technology, A-1040 Vienna, Austria
V. A. Ivanova ; Department of Nuclear Physics, State Polytechnical University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian Federation
V. F. Kosmach ; Department of Nuclear Physics, State Polytechnical University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian Federation
V. M. Samsonov ; Department of Nuclear Physics, State Polytechnical University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian Federation; St. Petersburg Institute for Nuclear Research, Gatchina, Russian Federation
N. I. Troitskaya ; Department of Nuclear Physics, State Polytechnical University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian Federation

Abstract

We describe the quark gluon plasma (QGP) as a thermalized quark–gluon system, the thermalized QGP phase of QCD. The hadronization of the thermalized QGP phase is given in a way resembling a coalescence model with correlated quarks and antiquarks. The input parameters of the approach are the spatial volumes of the hadronization. We introduce three dimensionless parameters, CM, CB and CB¯ , related to the spatial volumes of the production of low-lying mesons (M), baryons (B) and antibaryons (B). We show that at the temperature ¯ T = 175MeV our predictions for the ratios of multiplicities agree well with the presently available set of hadron ratios measured for various experiments given by the NA44, NA49, NA50 and WA97 Collaborations on Pb+Pb collisions at 158 GeV/nucleon, the NA35 Collaboration on S+S collisions and the NA38 Collaboration on O+U and S+U collisions at 200 GeV/nucleon.

Keywords

heavy-ion collisions; quark gluon plasma; hadronization; ratios of multiplicities

Hrčak ID:

305227

URI

https://hrcak.srce.hr/305227

Publication date:

1.9.2003.

Article data in other languages: croatian

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