High-Precision Ab Initio Radius Calculations of Boron Isotopes

Abstract

We perform a precision study of radii in Boron isotopes for multiple realistic interactions from chiral effective field theory. We obtain predictions of radii with combined many-body and interaction uncertainty quantification from ab initio no-core shell model calculations together with machine learning extrapolation methods. An extension to radius differences further allows us to investigate a potential proton halo in ${}^8$B and, moreover, provide predictions that relate directly to the isotope shift, which can be precisely measured in experiments.

8 pages, 6 figures, 2 tables, LaTeX; corrected typos, minor text additions, updated references