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arXiv 1104.4885nucl-th
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NN系统无π介子有效场论中的重整化群不变性

Renormalization group invariance in pionless effective field theory for the NN system

V. S. Timoteo, S. Szpigel, F. O. Duraes

摘要:

我们考虑NN相互作用在无π有效场论(EFT)的次-首阶(NNLO)和使用递归减法重整化方案来描述NN散射在1 S 0通道。我们将接触相互作用的强度固定在一个参考尺度上,选择一个为相移提供最佳拟合的尺度,然后通过非相对论性Callan-Symanzik方程来演化减去的Lippmann-Schwinger方程的驱动项,从而滑动重整化尺度。结果表明,这种多重减项的系统重整化方案是完全重整化群不变的。

英文摘要:

We consider the NN interaction in pionless effective field theory (EFT) up to next-to-next-to-leading order (NNLO) and use a recursive subtractive renormalization scheme to describe NN scattering in the 1S0 channel. We fix the strengths of the contact interactions at a reference scale, chosen to be the one that provides the best fit for the phase-shifts, and then slide the renormalization scale by evolving the driving terms of the subtracted Lippmann-Schwinger equation through a non-relativistic Callan-Symanzik equation. The results show that such a systematic renormalization scheme with multiple subtractions is fully renormalization group invariant.

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