2025/08/04 by Colquhoun, Brian, Davies, Christine T. H., Hatton, Daniel +1
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)
paper · doi:10.48550/arxiv.2508.02862
We extend an earlier lattice QCD analysis of heavy-quark current-current correlators to obtain new values for the MS masses of the b, c, and s quarks. The analysis uses gluon configurations from the MILC collaboration with vacuum polarization contributions from u, d, s, and c quarks (nf=4), and lattice spacings down to 0.032 fm. We find that mb(mb,nf=5) = 4.1911(62) GeV, mc(3 GeV,nf=4) = 0.9808(33) GeV, and ms(3 GeV,nf=4) = 83.34(26) MeV. These results are corrected for QED by including (quenched) QED in the simulations. They are among the most accurate values by any method to date. We give a detailed analysis of finite lattice-spacing errors that shows why the HISQ discretization of the quark action is particularly useful for b-quark simulations even for lattices where amb≈1. We also calculate QED and isospin corrections to the (fictitious) ηs-meson mass, which is used to tune s-quark masses in lattice simulations.