Universal pion freeze-out in heavy-ion collisions -: art. no. 022301

被引：76

作者：

Adamová, D

Agakichiev, G

Appelshäuser, H

Belaga, V

Braun-Munzinger, P

Castillo, A

Cherlin, A

Damjanovic, S

Dietel, T

Dietrich, L

Drees, A

Esumi, SI

Filimonov, K

Fomenko, K

Fraenkel, Z

Garabatos, C

Glässel, P

Hering, G

Holeczek, J

Kushpil, V

Lenkeit, B

Ludolphs, W

Maas, A

Marín, A

Milosevic, J

Milov, A

Miskowiec, D

Panebrattsev, Y

Petchenova, O

Petrácek, V

Pfeiffer, A

Rak, J

Ravinovich, I

Rehak, P

Sako, H

Schmitz, W

Schukraft, J

Sedykh, S

Shimansky, S

Slívová, J

Specht, HJ

Stachel, J

Sumbera, M

Tilsner, H

Tserruya, I

Wessels, JP

Wienold, T

Windelband, B

Wurm, JP

Xie, W

机构：

[1] Nucl Phys Inst ASCR, Rez 25068, Czech Republic

[2] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

[3] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[4] Joint Inst Nucl Res, Dubna 141980, Russia

[5] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[6] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[7] CERN, CH-1211 Geneva 23, Switzerland

[8] Brookhaven Natl Lab, Upton, NY 11973 USA

[9] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.90.022301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on an evaluation of data on pion interferometry and on particle yields at midrapidity, we propose a universal condition for thermal freeze-out of pions in heavy-ion collisions. We show that freeze-out occurs when the mean free path of pions lambda(f) reaches a value of about 1 fm, which is much smaller than the spatial extent of the system at freeze-out. This critical mean free path is independent of the centrality of the collision and beam energy from the Alternating Gradient Synchrotron to the Relativistic Heavy Ion Collider.

引用

页数：4

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