# Ab initio calculations of p-shell nuclei up to N2LO in chiral Effective Field Theory

## TL;DR

This paper reports on ab-initio calculations of p-shell nuclei using chiral Effective Field Theory interactions up to N2LO, demonstrating high numerical accuracy and comparing results with experimental data.

## Contribution

It provides the first comprehensive analysis of p-shell nuclei with chiral interactions up to N2LO, including three-body forces, and assesses the dependence on chiral order.

## Key findings

- Ground state energies vary with chiral order.
- Excitation spectra show good agreement with experiments.
- Quantifiable uncertainties are achieved in calculations.

## Abstract

Nuclear structure and reaction theory are undergoing a major renaissance with advances in many-body methods, realistic interactions with greatly improved links to Quantum Chromodynamics, the advent of high performance computing, and improved computational algorithms. State-of-the-art two- and three-nucleon interactions obtained from chiral Effective Field Theory provide a theoretical foundation for nuclear theory with controlled approximations. With highly efficient numerical codes, tuned to the current generation of supercomputers, we can perform ab-initio nuclear structure calculations for a range of nuclei to a remarkable level of numerical accuracy, with quantifiable numerical uncertainties. Here we present an overview of recent results for No-Core Configuration Interaction calculations of p-shell nuclei using these chiral interactions up to next-to-next-to-leading order, including three-body forces. We show the dependence of the ground state energies on the chiral order; we also present excitation spectra for selected nuclei and compare the results with experimental data.