FREEZE-OUT CONDITIONS AND PION SPECTRUM IN HEAVY-ION COLLISIONS

被引：13

作者：

GORENSTEIN, MI ^{[1
]}

TSAI, MS ^{[1
]}

YANG, SN ^{[1
]}

机构：

[1] KIEV THEORET PHYS INST, KIEV 252143, UKRAINE

来源：

PHYSICAL REVIEW C | 1995年 / 51卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.51.1465

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Pion multiplicity and energy spectrum in medium energy heavy-ion collisions are analyzed in a model with spherical expansion, resonance decay contribution, and chemical nonequilibrium effects. fitting the data for central La+La collision at Elab=1.35 GeV/nucleon we find that the physically reasonable freeze-out conditions require a strong collective motion to describe the pion spectrum and a positive value of pion chemical potential to fit the total pion multiplicity. The data do not lend to conclusive evidence on the presence of Δ resonance at the freeze-out. © 1995 The American Physical Society.

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页码：1465 / 1472

页数：8

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