OBSERVATION OF ENHANCED SUBTHRESHOLD K+ PRODUCTION IN CENTRAL COLLISIONS BETWEEN HEAVY-NUCLEI

被引：109

作者：

MISKOWIEC, D

AHNER, W

BARTH, R

CIESLAK, M

DEBOWSKI, M

GROSSE, E

HENNING, W

KOCZON, P

SCHICKER, R

SCHWAB, E

SENGER, P

BALTES, P

MUNTZ, C

OESCHLER, H

SARTORIUS, S

STURM, C

WAGNER, A

BECKERLE, P

BORMANN, C

BRILL, D

SHIN, Y

STEIN, J

STOCK, R

STROBELE, H

KOHLMEYER, B

POPPL, H

PUHLHOFER, F

SPEER, J

VOLKEL, K

WALUS, W

机构：

[1] TH DARMSTADT,D-64289 DARMSTADT,GERMANY

[2] JOHANN WOLFGANG GOETHE UNIV,D-60486 FRANKFURT,GERMANY

[3] PHILIPPS UNIV,D-35037 MARBURG,GERMANY

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

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.72.3650

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the very heavy collision system Au-197 + Au-197 the K+ production process was studied as a function of impact parameter at 1 GeV/nucleon, a beam energy well below the free N-N threshold. The K+ multiplicity increases more than linearly with the number of participant nucleons and the K+/pi+ ratio rises significantly when going from peripheral to central collisions. The measured K+ double differential cross section is enhanced by a factor of 6 compared to microscopic transport calculations if secondary processes (DELTAN --> K LAMBDA N and DELTADELTA --> K LAMBDA N) are ignored.

引用

页码：3650 / 3653

页数：4

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