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arXiv 2207.08784hep-thhep-ph
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幺正化非相对论库仑散射

Unitarizing non-relativistic Coulomb scattering

J. A. Oller

摘要:

我们比较了精确可解的非相对论库仑散射与最近两个无限程力的么正化方法。这些方法需要微扰地计算相应的分波振幅,然后将其归一化。我们计算库仑分波振幅的单圈顺序。一方面,文献[1]发展的么正化方法。[1,2]适当地再现了精确解,其精度随着输入微扰分波振幅的微扰计算的阶数的增加而提高。这也被证明是基态的极点位置的情况下。另一方面,最近文献[3]提出的方法产生的分波振幅不能再现已知的可解解,并产生结合能为零的极点位置。

英文摘要:

We compare the exactly solvable nonrelativistic Coulomb scattering with two recent unitarization methods for infinite-range forces. These methods require to calculate perturbatively the corresponding partial-wave amplitudes, which are then unitarized. We calculate the Coulomb partial-wave amplitudes up to the one-loop order. On the one hand, the unitarization method developed by Refs. [1, 2] reproduces properly the exact solution, with an accuracy improving as the order in the perturbative calculation of the input perturbative partial-wave amplitudes increases. This is also shown to be the case for the pole position of the ground state. On the other hand, the method developed by the more recent Ref. [3] gives rise to partial-wave amplitudes that do not reproduce the known solvable solution, and gives rise to a pole position with zero binding energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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