arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.01489nucl-th
收藏

修正的Weinberg方法中的双核子散射

Two-nucleon scattering in a modified Weinberg approach with a symmetry-preserving regularization

J. Behrendt, E. Epelbaum, J. Gegelia, Ulf-G. Meißner, A. Nogga

摘要:

本文将时间序微扰理论应用于重子手征微扰理论的洛伦兹不变式,研究了核子-核子散射问题。利用保持对称性的有效拉格朗日量的高阶导数形式,我们利用重整化条件的选择自由度,得到了具有改进的紫外行为的散射振幅的积分方程。由此产生的配方是用来量化有限监管文物在两个核子的相移,以及在手性外推的S-波散射长度和氘核结合能。这种方法可以直接扩展到分析涉及外部电弱源的少核子系统和过程。

英文摘要:

We consider the nucleon-nucleon scattering problem by applying time-ordered perturbation theory to the Lorentz invariant formulation of baryon chiral perturbation theory. Using a symmetry preserving higher derivative form of the effective Lagrangian, we exploit the freedom of the choice of the renormalization condition and obtain an integral equation for the scattering amplitude with an improved ultraviolet behavior. The resulting formulation is used to quantify finite regulator artifacts in two-nucleon phase shifts as well as in the chiral extrapolations of the S-wave scattering lengths and the deuteron binding energy. This approach can be straightforwardly extended to analyze few-nucleon systems and processes involving external electroweak sources.

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。

↑