Three-nucleon forces and spectroscopy of neutron-rich calcium isotopes

TL;DR

This paper investigates the excited-state properties of neutron-rich calcium isotopes using chiral two- and three-nucleon interactions, achieving good agreement with experimental data and providing new predictions.

Contribution

It introduces a comprehensive many-body framework incorporating 3N forces and extended valence space, improving spectroscopy predictions for calcium isotopes.

Findings

Good agreement with experimental spectroscopy data

Accurate description of electromagnetic transitions

Predictions for unexplored neutron-rich calcium isotopes

Abstract

We study excited-state properties of neutron-rich calcium isotopes based on chiral two- and three-nucleon interactions. We first discuss the details of our many-body framework, investigate convergence properties, and for two-nucleon interactions benchmark against coupled-cluster calculations. We then focus on the spectroscopy of 47-56Ca, finding that with both 3N forces and an extended pfg9/2 valence space, we obtain a good level of agreement with experiment. We also study electromagnetic transitions and find that experimental data are well described by our calculations. In addition, we provide predictions for unexplored properties of neutron-rich calcium isotopes.