标题： 吸引性奇异势的重整化中的接触算子 显示英文标题

标题： Contact operators in renormalization of attractive singular potentials

摘要： 我们讨论了在 NN 散射的 3P0 通道中，当 leading order 的一阶π交换被非微扰处理时，chiral 核力的重正化在次次领头阶（N2LO）的情况。subleading 接触势的矩阵元对于所谓的 exceptional 超紫外动量截断变得几乎相互依赖，这使得很难从经验相移确定这些接触势的强度，正如文献 [1] 中所报道的。 我们认为可以通过调整由数据推导低能常数的策略来解决这个问题，从而使得那些 exceptional 截断适用于 chiral 有效场论。 显示英文摘要

摘要： We discuss renormalization of chiral nuclear forces in the 3P0 channel of N N scattering at next- to-next-to leading order (N2LO) if the one-pion exchange is treated nonperturbatively at leading order. The matrix elements of the subleading contact potentials become nearly dependent of each other for the so-called exceptional ultraviolet momentum cutoff, making it difficult to determine the strengths of those contact potentials from the empirical phase shifts, as reported in Ref. [1]. We argue that this issue can be resolved by adjusting the strategy by which the low-energy constants are deduced from the data, thus making those exceptional cutoffs amenable to chiral effective field theory.