STRANGENESS PRODUCTION IN ANTIPROTON ANNIHILATION ON NUCLEI

被引:83
作者
CUGNON, J
DENEYE, P
VANDERMEULEN, J
机构
[1] Université de Liège, Physique Nucléaire Théorique, Institut de Physique au Sart Tilman
来源
PHYSICAL REVIEW C | 1990年 / 41卷 / 04期
关键词
D O I
10.1103/PhysRevC.41.1701
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The strangeness production in antiproton annihilation on nuclei is investigated by means of a cascade-type model, within the frame of the conventional picture of the annihilation on a single nucleon followed by subsequent rescattering proceeding in the hadronic phase. The following hadrons are introduced: N, K, and K and, as far as possible, the experimental reaction cross sections are used in our simulation. The numerical results are compared with experimental data up to 4 GeV/c. The yield is correctly reproduced, while the and Ks yields are overestimated in the pTa and pNe cases. On the other hand, the rapidity and perpendicular momentum distributions are well reproduced. It is shown that total strange yield is not very much affected by the associated production taking place during the rescattering process. It is also shown that the /Ks ratio is largely due to the strangeness exchange reactions induced by antikaons. In particular, values of the order of 1 to 3 are expected in the energy range investigated here, independently of the detail of the hadronic phase dynamics. Finally, it is stressed that rapidity distributions are consistent with the rescattering process. Comparison with other works and implications of our results are examined. © 1990 The American Physical Society.
引用
收藏
页码:1701 / 1718
页数:18
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