Work

New high-precision b , c , and s masses from pseudoscalar-pseudoscalar correlators in n f = 4 lattice QCD

Year: 2026

Type: article

Abstract: 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 ( n f = 4 ), and lattice spacings down to 0.032 fm. We find that m ¯ b ( m ¯ b , n f = 5 ) = 4.1923 ( 63 ) GeV , m ¯ c ( 3 GeV , n f = 4 ) = 0.9813 ( 34 ) GeV , and m ¯ s ( 3 GeV , n f = 4 ) = 83.39 ( 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 highly improved staggered quark discretization of the quark action is particularly useful for b -quark simulations even for lattices where a m b ≈ 1 . We also calculate QED and isospin corrections to the (fictitious) η s -meson mass, which is used to tune s -quark masses in lattice simulations.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/hvsx-nk6m

Authors: Brian Colquhoun, Christine T. H. Davies, Daniel Hatton, G. Peter Lepage

Institutions: University of Glasgow, Cornell University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Department for Business, Energy and Industrial Strategy, UK Government, UK Research and Innovation, Science and Technology Facilities Council

Award: Phenomenology from lattice QCD and collider physics