标题： Omega和phi介子在p n -> d M反应中的产生及OZI规则违背 near threshold 显示英文标题

标题： Omega- and phi-meson production in p n -> d M reactions near threshold and OZI-rule violation

摘要： 我们研究了接近相应阈值的反应 p n -> d omega 和 p n -> d phi。 S 波振幅是在两步模型的框架内计算的，该模型由一个三角图描述，其中间态包含 π、ρ 和 ω 介子。 预测反应 p n -> d omega 和 p n -> d phi 的截面在相同的质心系过剩能量 Q 值下显著大于相应反应 p p -> p p omega 和 p p -> p p phi 的截面。 发现 φ 与 ω 的产率比为 (30 +/- 7) x 10^-3。 显示英文摘要

摘要： We investigate the reactions p n -> d omega and p n -> d phi close to the corresponding thresholds. The S-wave amplitudes are calculated within the framework of the two-step model which is described by a triangle graph with pi, rho and omega mesons in the intermediate state. The cross sections of the reactions p n -> d omega and p n -> d phi are predicted to be significantly larger than the cross sections of the corresponding reactions p p -> p p omega and p p -> p p phi at the same values of the c.m. excess energy Q. The ratio of the yields of phi to omega is found to be (30 +/- 7) x 10^-3.