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FIZIKA B 12 (2003) 3, 235 - 256
 
ON HADRON PRODUCTION FROM THE QUARK-GLUON PLASMA PHASE IN
ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS
A. YA. BERDNIKOVa, YA. A. BERDNIKOVa,b,1, A. N.
IVANOVa,c,2, V. A. IVANOVAa, V. F. KOSMACHa, V. M.
SAMSONOVa,d,3 and N. I. TROITSKAYAa
aDepartment of Nuclear Physics, State Polytechnical
University of St. Petersburg, Polytechnicheskaya 29, 195251 St. Petersburg, Russian
Federation
bState Technical University, Department of Nuclear Physics, 195251 St.
Petersburg, Russian Federation
cAtomic Institute of the Austrian Universities and Vienna University of
Technology, A-1040 Vienna, Austria
dSt. Petersburg Institute for Nuclear Research, Gatchina, Russian Federation
E-mail addresses: 1berdnikov@twonet.stu.neva.ru,
2ivanov@kph.tuwien.ac.at, 3samsonov@hep486.pnpi.spb.ru
Received 21 November 2002; Accepted 24 November 2003
Online 19 April 2004
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 C`B,
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 = 175 MeV 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.
PACS numbers: 25.75.-q, 12.38.Mh, 24.85.+p
UDC 539.172
Keywords: heavy-ion collisions, quark gluon plasma, hadronization, ratios of
multiplicities
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