We report on a calculation of Bc ground state and radial excitation energies, obtained from heavy-charm highly improved staggered quark (HISQ) correlators computed on MILC gauge ensembles, with lattice spacings down to a=0.044 fm. Using HISQ valence quarks on progressively finer lattices allows us to simulate up to the b-quark mass. In particular we focus on the Bc(2S) energy, which we compare with O(\alpha_s)-improved non-relativistic QCD results computed on the same ensembles and recent experimental results from ATLAS.
@article{arxiv.1811.09448,
title = {$B_c$ spectroscopy using highly improved staggered quarks},
author = {Andrew Lytle and Brian Colquhoun and Christine Davies and Jonna Koponen},
journal= {arXiv preprint arXiv:1811.09448},
year = {2018}
}
Comments
7 pages, 3 figures. Presented at the 36th Annual International Symposium on Lattice Field Theory, July 22-28, 2018, East Lansing, MI, USA