B and bottomonium spectroscopy from lattice NRQCD with charm in the sea

TL;DR

This paper presents lattice QCD calculations of B, Bs, Bc, and bottomonium spectra using NRQCD and HISQ quarks, providing improved results and predictions for various states with systematic error control.

Contribution

It introduces improved systematic error control in lattice NRQCD calculations for bottom and bottomonium spectra, including D-wave predictions and B meson masses.

Findings

Enhanced accuracy in S-wave and P-wave bottomonium states

Predicted D-wave bottomonium spectrum

Preliminary B meson mass results

Abstract

We give results for B, Bs, Bc and bottomonium spectroscopy using NRQCD heavy quarks and HISQ valence and sea quarks. Five MILC ensembles of gluon configurations with three values of the lattice spacing and m(light)/m(strange) values down to 0.1 are used that include 2+1+1 flavours of sea quark. Systematic errors in the NRQCD action are improved through the radiative correction of the coefficients of terms at v^4. Improved results for S-wave and P-wave bottomonium states are discussed as well as a prediction for the full D-wave spectrum. Preliminary results for the ground state B meson masses are also presented.