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arXiv 0803.2342nucl-th
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GeV区域中的反应pp-> {pp}_s pi^0和pi^0 p再散射

Reaction pp-> {pp}_s pi^0 in the GeV region and pi^0 p rescattering

Yu. N. Uzikov

摘要:

反应pp -> {pp}_s pi^0横截面的COSY数据,其中{pp}_s是在小激发能E_{pp} =0-3 MeV下处于1 S 0状态的质子对,最近在束流能量0.5 - 2.0 GeV下获得的数据在一π交换模型内进行了分析。该模型基于子过程pi^0 p -> pi^0 p和最终状态pp-相互作用。在前向截面的能量依赖性中,在0.5 - 1.4 GeV处观察到一个宽的极大值,该模型解释了这是由于π ^0 p-再散射中的同位旋3/2的主要贡献。在2 GeV观测到的第二个最大值在模型中被低估了一个数量级。

英文摘要:

COSY data on the cross section of the reaction pp -> {pp}_s pi^0, where {pp}_s is the proton pair in the 1S0 state at small excitation energy E_{pp}=0-3 MeV, recently obtained for beam energies 0.5 - 2.0 GeV are analyzed within the one-pion exchange model. The model is based on the subprocess pi^0 p -> pi^0 p and final state pp-interaction. A broad maximum observed in the energy dependence of the cross section at 0.5 - 1.4 GeV in the forward direction is explained by this model as a dominant contribution of the isospin 3/2 in the pi^0 p-rescattering. The second maximum observed at 2 GeV is underpredicted within the model by one order of magnitude.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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