High-precision <i>ab initio</i> radius calculations of boron isotopes

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 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 <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi mathvariant="normal">B</a:mi><a:mprescripts/><a:none/><a:mn>8</a:mn></a:mmultiscripts></a:math> and, moreover, provide predictions that relate directly to the isotope shift, which can be precisely measured in experiments.