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假定BES合作组在辐射衰变J/ψ-γpp-中观测到的pp-谱的增强是由于存在一个pp-的分子态,用线性σ 模型计算了它的束缚能和寿命．具体考虑了这种增强现象是由于pp-可能形成一个S波或P波共振态,并把计算 结果和实验数据做了比较．与氚核不同,由于pp-可以通过s道湮没,因此通过研究它的总宽度可以获得线性σ模 型及其相关问题的信息．
Assuming that the enhanced pp-spectrum observed by the BES cooperative group in the radiative decay J / ψ-γpp- is due to the presence of a pp- molecular state, its bound energy and lifetime are calculated using a linear σ model. This enhancement is specifically considered due to the fact that pp- may form an S-wave or P-wave resonance state, and the calculated results are compared with the experimental data. Unlike triton, because pp- can be annihilated by s, we can obtain the information of the linear σ model and its related problems by studying its total width.