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arXiv · 2402.00634

High-resolution momentum distributions from low-resolution wave functions

A. J. Tropiano·S. K. Bogner·R. J. Furnstahl·M. A. Hisham·A. Lovato·R. B. Wiringa
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Abstract

Nucleon momentum distributions calculated with a common one-body operator vary with the resolution scale (and scheme) of the Hamiltonian used. For high-resolution potentials such as Argonne $v_{18}$ (AV18) there is a high-momentum tail, reflecting short-range correlations in the nuclear wave function, which is reduced or absent for softer, lower-resolution interactions. We explore if the similarity renormalization group (SRG) can be used to quantitatively reproduce the high-resolution distributions from variational Monte Carlo at all momenta using SRG-evolved operators and empirically fit single-particle orbitals rather than a full RG evolution of many-body wave functions. The goal of this approach is to enable calculations of high-resolution distributions for a wider range of nuclei as well as for other interactions, and provides connections to phenomenological analyses of experiments.

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A. J. Tropiano, S. K. Bogner, R. J. Furnstahl, M. A. Hisham, A. Lovato, R. B. Wiringa. 2024-02-01. High-resolution momentum distributions from low-resolution wave functions. https://doi.org/10.1016/j.physletb.2024.138591

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