标题： 质子-质子碰撞中Lambda和Sigma(0)阈值产生的比较 显示英文标题

标题： Comparison of Lambda and Sigma(0) Threshold Production in Proton-Proton Collisions

摘要： 阈值测量的关联奇异性产生反应 pp --> p K(+) Lambda 和 pp --> p K(+) Sigma(0) 被呈现出来。尽管观察到激发函数形状的微小差异，但数据最显著的特点是在相同的过剩能量下，Sigma(0) 产生的总截面似乎比 Lambda 粒子的总截面小约28倍。得出结论认为，强烈的 Sigma(0)-p 最终态相互作用，特别是 Sigma-N --> Lambda-p 转换反应，可能是 Sigma 信号中产率减少的可能原因。这一假设与其他文献中的实验证据一致。 显示英文摘要

摘要： Threshold measurements of the associated strangeness production reactions pp --> p K(+) Lambda and pp --> p K(+) Sigma(0) are presented. Although slight differences in the shapes of the excitation functions are observed, the most remarkable feature of the data is that at the same excess energy the total cross section for the Sigma(0) production appears to be about a factor of 28 smaller than the one for the Lambda particle. It is concluded that strong Sigma(0)-p final state interactions, and in particular the Sigma-N --> Lambda-p conversion reaction, are the likely cause of the depletion for the yield in the Sigma signal. This hypothesis is in line with other experimental evidence in the literature.