Few- and many-nucleon systems with semilocal coordinate-space regularized chiral nucleon-nucleon forces

TL;DR

This paper uses advanced ab initio methods to analyze light and medium-mass nuclei with new chiral nucleon-nucleon potentials, assessing convergence, accuracy, and uncertainty quantification in nuclear physics calculations.

Contribution

It introduces a comprehensive analysis framework employing various ab initio methods with semilocal coordinate-space regularized chiral potentials, including novel uncertainty quantification techniques.

Findings

Demonstrates convergence patterns of chiral expansion

Provides estimates of theoretical accuracy at different chiral orders

Explores robustness and alternative methods for uncertainty estimation

Abstract

We employ a variety of ab initio methods including Faddeev-Yakubovsky equations, No-Core Configuration Interaction Approach, Coupled-Cluster Theory and In-Medium Similarity Renormalization Group to perform a comprehensive analysis of the nucleon-deuteron elastic and breakup reactions and selected properties of light and medium-mass nuclei up to 48Ca using the recently constructed semilocal coordinate-space regularized chiral nucleon-nucleon potentials. We compare the results with those based on selected phenomenological and chiral EFT two-nucleon potentials, discuss the convergence pattern of the chiral expansion and estimate the achievable theoretical accuracy at various chiral orders using the novel approach to quantify truncation errors of the chiral expansion without relying on cutoff variation. We also address the robustness of this method and explore alternative ways to estimate the theoretical uncertainty from the truncation of the chiral expansion.