标题： π介子偶素的相对论修正 显示英文标题

标题： Relativistic corrections to the Pionium Lifetime

摘要： 接下来的顺序贡献被考虑在介子偶素的寿命中，这是在非相对论有效场论框架下进行的。 为了与可以从手征微扰理论得到的相对论介子-介子散射振幅保持一致，需要更精确地确定耦合常数。 发现相对论修正为4.1%，这仅仅是对应于非相对论衰变动量的更准确值。 显示英文摘要

摘要： Next to leading order contributions to the pionium lifetime are considered within non-relativistic effective field theory. A more precise determination of the coupling constants is then needed in order to be consistent with the relativistic pion-pion scattering amplitude which can be obtained from chiral perturbation theory. The relativistic correction is found to be 4.1% and corresponds simply to a more accurate value for the non-relativistic decay momentum.