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.
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页码：3650 / 3653
页数：4
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