Subthreshold production of kaons and antikaons in nucleus-nucleus collisions at equivalent beam energies

被引：252

作者：

Barth, R

Senger, P

Ahner, W

Beckerle, P

Bormann, C

Brill, D

Cieslak, M

Debowski, M

Grosse, E

Koczon, P

Kohlmeyer, B

Miskowiec, D

Muntz, C

Oeschler, H

Puhlhofer, F

Schwab, E

Schicker, R

Shin, Y

Speer, J

Strobele, H

Sturm, C

Volkel, K

Wagner, A

Walus, W

机构：

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

[2] UNIV FRANKFURT,D-60325 FRANKFURT,GERMANY

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

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

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.78.4007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Kaon production has been studied in Ni + Ni collisions at beam energies of 0.8-1.8 GeV/nucleon with the kaon spectrometer at GSI. The K+ production cross section increases as E-beam(5.3+/-0.2). Both K+ and K- mesons are predominantly produced in central collisions. The K-/K+ ratio measured at equivalent beam energies below the respective particle production threshold is considerably larger for Ni + Ni collisions than for nucleon-nucleon collisions near threshold. This is evidence for an enhanced K- production in the nuclear medium.

引用

页码：4007 / 4010

页数：4

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