论文标题
$ p \ bar {p} \至ψη$反应中低凹核共振的作用
Role of the low-lying nucleon resonances in the $p\bar{p} \to ψη$ reaction
论文作者
论文摘要
在有效的Lagrangian方法中，我们研究了$ p \ bar {p} \ rightarrowψη$ [$ψ\equivψ（3686）$，$ j/ψ$]在低能的反应中，其中核素极点的贡献和低溶剂核共振的核共振，$ n（1520）$ n（1520）$ n（1535）$ n（1535）和$ n（1650）（1650）。所有模型参数均在$ψ\ to p \ bar {p}η$的当前实验数据的帮助下确定。在模型参数中，预测了$ p \ bar {p} \ rightarrowψη$反应的总和微分截面。我们表明，不同核子共振的不同振幅之间的相对阶段将显着改变$ \ bar {p} p \ toψη$反应的角度分布。因此，我们得出的结论是，这些反应适合于实验研究低洼核子共振和反应机理的特性。我们希望这些理论计算可以通过未来的实验进行测试。
Within the effective Lagrangian approach, we study the $p\bar{p} \rightarrow ψη$ [$ψ\equivψ(3686)$, $J/ψ$] reaction at the low energy where the contributions from nucleon pole and low-lying nucleon resonances, $N(1520)$, $N(1535)$ and $N(1650)$ are considered. All the model parameters are determined with the help of current experimental data on the decay of $ψ\to p \bar{p} η$. Within the model parameters, the total and differential cross sections of the $p\bar{p} \rightarrow ψη$ reaction are predicted. We show that the relative phases between different amplitudes of different nucleon resonance will change significantly the angular distributions of the $\bar{p} p \to ψη$ reaction. Therefore, we conclude that these reactions are suitable to study experimentally the properties of the low-lying nucleon resonance and the reaction mechanisms. We hope that these theoretical calculations can be tested by future experiments.
