Systematic study of large-momentum distribution in nuclei with the operator product expansion
Phys. Rev. C 112, 014005 – Published 17 July, 2025
DOI: https://doi.org/10.1103/25lw-j1lj
Abstract
The operator product expansion (OPE) is applied in conjunction with Pionless effective field theory to study the short-range structure of nuclei. By matching the OPE with the selected nuclear potentials for nucleon-nucleon scattering states, we obtain the Wilson coefficients. The nucleon momentum distribution in the deuteron is then used to test the OPE against the predictions of these nuclear potentials. In order to achieve a systematic separation of short-range and long-range interactions, we discuss how the OPE approximation can be improved by including higher-order EFT potentials and higher-dimension local operators.
