A QUARK-MODEL OF ANTILAMBDA LAMBDA PRODUCTION IN (P) OVER-BAR-P INTERACTIONS

被引：27

作者：

ALBERG, MA

HENLEY, EM

WILETS, L

KUNZ, PD

机构：

[1] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

[2] UNIV COLORADO,NUCL PHYS LAB,BOULDER,CO 80309

来源：

NUCLEAR PHYSICS A | 1993年 / 560卷 / 01期

关键词：

D O I：

10.1016/0375-9474(93)90102-4

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：

A quark model which includes both scalar and vector contributions to the reaction mechanism is used in a DWBA calculation of total and differential cross sections, polarizations, and spin-correlation coefficients for the reaction ppBAR --> LAMBDALAMBDABAR at laboratory momenta from threshold to 1.92 GeV/c. The free parameters of the calculation include the scalar and vector strengths, a quark-cluster size parameter, and six parameters in the unknown LAMBDALAMBDABAR interaction. Excellent agreement with experiment is found for a constructive interference of scalar and vector terms, and for a LAMBDALAMBDABAR potential which differs from that suggested by several authors on the basis of SU(3) arguments. The fit to the data is better than that obtained by other quark models, which use only scalar or vector annihilation terms. The agreement with experiment is as good as that found in meson-exchange models, which use more parameters than the present calculation.

引用

页码：365 / 388

页数：24

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