标题： 反质子-氢在亚开尔文温度下的湮灭 显示英文标题

标题： Antiproton-Hydrogen annihilation at sub-kelvin temperatures

摘要： 超低能量反质子（$% E\le10^{-6}$a.u.）与原子氢的相互作用的主要特性得到了确立。 它们包括弹性与非弹性截面以及正子素（Pn）的形成谱。 在单位耦合通道模型的框架内考虑了逆俄歇过程（$Pn+e \to H+\bar{p}$）。 发现湮灭截面比黑球吸收模型的预测小几倍。 预测了一族接近阈值的亚稳态$\bar{p}H$。 分析了正子素形成概率与这类接近阈值S矩阵奇点位置的依赖关系。 得到了$H\bar{H}$湮灭截面的估计值。 显示英文摘要

摘要： The main properties of the interaction of ultra low-energy antiprotons ($% E\le10^{-6}$ a.u.) with atomic hydrogen are established. They include the elastic and inelastic cross sections and Protonium (Pn) formation spectrum. The inverse Auger process ($Pn+e \to H+\bar{p}$) is taken into account in the framework of an unitary coupled-channels model. The annihilation cross-section is found to be several times smaller than the predictions made by the black sphere absorption models. A family of $\bar{p}H$ nearthreshold metastable states is predicited. The dependence of Protonium formation probability on the position of such nearthreshold S-matrix singularities is analysed. An estimation for the $H\bar{H}$ annihilation cross section is obtained.