论文标题
QED的核后坐力理论有限大小
QED theory of the nuclear recoil with finite size
论文作者
论文摘要
当一个粒子获得有限的大小时，我们研究了两个点样颗粒之间横向电磁相互作用的修饰。结果表明，这种相互作用的正确处理无法在BREIT近似中完成，但应在QED内解决。完整的QED公式是针对有限尺寸的核后坐力得出的，该公式在耦合强度参数$ z \，α$中精确。数值计算是针对$ z $进行的，并针对$（z \，α）^5 $贡献进行了验证。与$ z \，α$扩展的比较确定了$（z \，α）^6 $的贡献，该订单在核半径中是线性的，并且在低阶$（z \，α）^5 $项上数值主导。
We investigate the modification of the transverse electromagnetic interaction between two point-like particles when one particle acquires a finite size. It is shown that the correct treatment of such interaction cannot be accomplished within the Breit approximation but should be addressed within the QED. The complete QED formula is derived for the finite-size nuclear recoil, exact in the coupling strength parameter $Z\,α$. Numerical calculations are carried out for a wide range of $Z$ and verified against the $(Z\,α)^5$ contribution. The comparison with the $Z\,α$ expansion identifies the contribution of order $(Z\,α)^6$, which is linear in the nuclear radius and numerically dominates over the lower-order $(Z\,α)^5$ term.
