低能ppeta和ppeta体系相互作用的比较研究
Comparative studies of the interaction in the low energy ppeta and ppeta' systems
摘要：
COSY-11合作测量了pp -> ppeta和pp -> ppeta'反应，以便对质子-质子-介子系统内的相互作用进行比较研究。本文详细分析了在质子束动量为3.260GeV/c时测量的pp → ppeta反应。阐述的结果在差分分布的平方不变质子质子（s_pp）和质子-η '（s_peta'）的质量，以及角分布和总截面在过剩能量为16.4 MeV。将微分分布s_pp和s_peta'与理论预测和pp -> ppeta反应确定的类似光谱进行比较。η介子和η '介子产生结果的比较排除了在不变质量分布中观察到的增强是由于介子-质子相互作用的假设。此外，分布的形状不支持任何假设的理论模型。
英文摘要：
The COSY-11 collaboration measured the pp -> ppeta and pp -> ppeta' reactions in order to perform comparative studies of the interactions within the proton-proton-meson system. This thesis presents in detail the analysis of the pp -> ppeta' reaction which was measured at the proton beam momentum of 3.260 GeV/c. The elaboration results in differential distributions of squared invariant proton-proton (s_pp) and proton-eta' (s_peta') masses, as well as in angular distributions and the total cross section at an excess energy of 16.4 MeV. The differential distributions s_pp and s_peta' are compared to theoretical predictions and to the analogous spectra determined for the pp -> ppeta reaction. The comparison of the results for the eta and eta' meson production rather excludes the hypothesis that the enhancement observed in the invariant mass distributions is due to the meson-proton interaction. Further, the shapes of the distributions do not favour any of the postulated theoretical models.
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