AZIMUTHALLY ANISOTROPIC EMISSION OF PIONS IN SYMMETRICAL HEAVY-ION COLLISIONS

被引：90

作者：

BRILL, D

AHNER, W

BALTES, P

BARTH, R

BORMANN, C

CIESLAK, M

DEBOWSKI, M

GROSSE, E

HENNING, W

KOCZON, P

KOHLMEYER, B

MISKOWIEC, D

MUNTZ, C

OESCHLER, H

POPPL, H

PUHLHOFER, F

SARTORIUS, S

SCHICKER, R

SENGER, P

SHIN, Y

SPEER, J

STEIN, J

STIEBING, K

STOCK, R

STROBELE, H

VOLKEL, K

WAGNER, A

WALUS, W

机构：

[1] GESELL SCHWERIONENFORSCH MBH, W-6100 DARMSTADT, GERMANY

[2] TH DARMSTADT, W-6100 DARMSTADT, GERMANY

[3] UNIV MARBURG, W-3550 MARBURG, GERMANY

[4] JAGIELLONIAN UNIV, PL-30059 KRAKOW, POLAND

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.71.336

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Triple differential cross sections d3sigma/dp3 for charged pions produced in symmetric heavy-ion collisions were measured with the KaoS magnetic spectrometer at the heavy-ion synchrotron facility SIS at GSI. The correlations between the momentum vectors of charged pions and the reaction plane in Au-197 + Au-197 collisions at an incident energy of 1 GeV/nucleon were determined. We observe, for the first time, an azimuthally anisotropic distribution of pions, with enhanced emission perpendicular to the reaction plane. The anisotropy is most pronounced for pions of high transverse momentum in semicentral collisions.

引用

页码：336 / 339

页数：4

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