RESONANCE DECAYS AND ENTROPY BALANCE IN RELATIVISTIC NUCLEAR COLLISIONS

被引：17

作者：

SOLLFRANK, J

HEINZ, U

机构：

[1] Institut für Theoretische Physik, Universität Regensburg, W-8400 Regensburg

来源：

PHYSICS LETTERS B | 1992年 / 289卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)91374-I

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that for an estimate of the total entropy produced in heavy ion collisions it is important to take into account resonance decay contributions. The naive procedure, which starts from the measured total or (negative) charged multiplicity and assumes an ideal Bose gas of massless pions for the equation of state. underestimates the entropy by up to a factor 2 compared to more realistic models of the system at freeze-out. The main reasons for this are a higher entropy per particle in a realistic hadron resonance gas and large non-thermal contributions to the observed pion multiplicity from resonance decays.

引用

页码：132 / 136

页数：5

共 23 条

[1]

AGUILARBENITEZ M, 1991, Z PHYS C PART FIELDS, V50, P405, DOI 10.1007/BF01551452

[2]

AWES TC, 1992, NUCL PHYS A, V544

[3]

BARTKE J, 1990, Z PHYS C PART FIELDS, V48, P191, DOI 10.1007/BF01554465

[4] PION PION CROSS-SECTION IN A DENSE AND HOT PIONIC GAS [J].

BARZ, HW ;

BERTSCH, G ;

DANIELEWICZ, P ;

SCHULZ, H .

PHYSICS LETTERS B, 1992, 275 (1-2) :19-23

[5]

BLAIZOT JP, 1991, NUCL PHYS A, V525

[6] PRODUCTION OF VECTOR AND TENSOR MESONS IN PROTON-PROTON COLLISIONS AT SQUARE-ROOT-S=52.5 GEV [J].

DRIJARD, D ;

FISCHER, HG ;

GEIST, W ;

INNOCENTI, PG ;

KORBEL, V ;

MINTEN, A ;

NORTON, A ;

STEIN, S ;

ULLALAND, O ;

WAHL, HD ;

FONTAINE, G ;

GHESQUIERE, C ;

SAJOT, G ;

HANKE, P ;

HOFMANN, W ;

PANTER, M ;

RAUSCHNABEL, K ;

SPENGLER, J ;

WEGENER, D ;

FREHSE, H ;

HEIDEN, M ;

KLUGE, EE ;

PUTZER, A ;

DELLANEGRA, M ;

LINGLIN, D ;

GOKIELI, R ;

SOSNOWSKI, R .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1981, 9 (04) :293-303

[7] LOW-PT PION ENHANCEMENT FROM PARTIAL THERMALIZATION IN NUCLEAR COLLISIONS [J].

GAVIN, S ;

RUUSKANEN, PV .

PHYSICS LETTERS B, 1991, 262 (2-3) :326-332

[8]

GEIGER K, 1992, THERMALIZATION ULTRA

[9] KINETICS OF AN EXPANDING PION GAS [J].

GERBER, P ;

LEUTWYLER, H ;

GOITY, JL .

PHYSICS LETTERS B, 1990, 246 (3-4) :513-519

[10]

HERNANDEZ JJ, 1990, PHYS LETT B, V239, P1

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