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- W2964176268 abstract "Nucleon-nucleon $(mathit{NN})$ scattering is studied by applying an approach based on the $mathit{N}/mathit{D}$ method and chiral perturbation theory (ChPT), whose dynamical input per partial wave consists of the imaginary part of the $mathit{NN}$ partial-wave amplitude along the left-hand cut. The latter is calculated in one-loop ChPT up to and including next-to-next-to-leading order (NNLO). A power counting for the subtraction constants is established, which is appropriate for those subtractions attached to both the left- and the right-hand cuts. A quite good reproduction of the Nijmegen partial-wave analysis phase shifts and mixing angles results, which implies a steady improvement in the accurateness achieved by increasing the chiral order in the calculation of the dynamical input. I discuss that it is not necessary to fine tune the chiral counterterms ${c}_{i}$ determined from pion-nucleon scattering to agree with $mathit{NN}$ data, but instead one should perform the iteration of two-nucleon intermediate states in a well-defined way so as to keep proper unitarity and analyticity. It is also confirmed at NNLO the long-range correlations between the $mathit{NN} S$-wave effective ranges and scattering lengths, when employing only once-subtracted dispersion relations, that hold up to around 10% when compared with experimental values." @default.
- W2964176268 created "2019-07-30" @default.
- W2964176268 creator A5020202010 @default.
- W2964176268 date "2016-02-11" @default.
- W2964176268 modified "2023-09-24" @default.
- W2964176268 title "Nucleon-nucleon scattering from dispersion relations: Next-to-next-to-leading order study" @default.
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