Charmonium properties from lattice QCD+QED : Hyperfine splitting, J/ψ leptonic width, charm quark mass, and aμc

@article{Hatton2020CharmoniumPF,
  title={Charmonium properties from lattice 
QCD+QED
: Hyperfine splitting, 
J/$\psi$
 leptonic width, charm quark mass, and 
a$\mu$c},
  author={D. Hatton and Christine T. H. Davies and B. Galloway and Jonna Koponen and G. Peter Lepage and Andrew Lytle},
  journal={Physical Review D},
  year={2020}
}
We have performed the first n f = 2 + 1 + 1 lattice QCD computations of the properties (masses and decay constants) of ground-state charmonium mesons. Our calculation uses the HISQ action to generate quark-line connected two-point correlation functions on MILC gluon field configurations that include u / d quark masses going down to the physical point, tuning the c quark mass from M J / ψ and including the effect of the c quark’s electric charge through quenched QED… 

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