Dropping the Wigner-SU(4)-breaking tensor part of one-pion exchange at N2LO fixes the 3S1 channel and leads to a hypothesis that this part stays weak up to pion-scale momenta.
Naturalness in Nuclear Effective Field Theories
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abstract
Nuclear effective field theories (EFTs) have been developed over the last quarter-century with considerable impact on the description of light and even medium-mass nuclei. At the core of any EFT is a systematic expansion of observables, which is usually obtained from a rule based on an assumption of naturalness. I discuss naturalness in the context of the relatively weak binding of nuclei, where discrete scale invariance plays a role in the emergence of complexity.
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The Unitarity-Limit Expansion for Two Nucleons with Perturbative Pions: Digest and Ideas
Dropping the Wigner-SU(4)-breaking tensor part of one-pion exchange at N2LO fixes the 3S1 channel and leads to a hypothesis that this part stays weak up to pion-scale momenta.