TRANSVERSE-MOMENTUM DISTRIBUTIONS OF ETA-MESONS IN NEAR-THRESHOLD RELATIVISTIC HEAVY-ION REACTIONS

被引：51

作者：

BERG, FD

PFEIFFER, M

SCHWALB, O

FRANKE, M

KUHN, W

LOHNER, H

METAG, V

NOTHEISEN, M

NOVOTNY, R

RASCHKE, AE

RITMAN, J

ROBIGLANDAU, M

SIMON, RS

SUMBERA, M

VENEMA, L

WILSCHUT, H

机构：

[1] KERNFYS VERSNELLER INST, 9747 AA GRONINGEN, NETHERLANDS

[2] GESELL SCHWERIONENFORSCH MBH, D-64220 DARMSTADT, GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.72.977

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Transverse momentum spectra of eta mesons have been measured near the free nucleon-nucleon production threshold in the heavy ion reactions Ar-40+Ca-nat, Kr-86+Zr-nat, and Au-197+Au-197 at 1.0A GeV and also in Ar-40+Ca-nat at 1.5A GeV. The measured transverse momentum distributions are compared to model calculations. The relative abundance of Delta(1232) and N(1535) resonances excited in the collision is deduced. A comparison to pion data reveals scaling with the transverse mass of the emitted meson.

引用

页码：977 / 980

页数：4

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