Charmonium, Dₛ and Dₛ* from overlap fermion on DWF configurations
Yang, Y. B. · Chen, Y. · Alexandru, A. · Dong, S. J. · Draper, T. · Gong, M. · Lee, F. X. · Li, A. · Liu, K. F. · Liu, Z. · Lujan, M. · Mathur, N.
Original · EN
We take a new approach to determine the scale parameter r₀, the physical masses of strange and charm quarks through a global fit which incorporates continuum extrapolation, chiral extrapolation and quark mass interpolation to the lattice data. The charmonium and charm-strange meson spectrum are calculated with overlap valence quarks on 2+1-flavor domain-wall fermion gauge configurations generated by the RBC and UKQCD Collaboration. We use the masses of Dₛ, Dₛ* and J/ψ as inputs and obtain mc MS(2 GeV)=1.110(24) GeV, mₛ MS(2 GeV)=0.104(9) GeV and r₀=0.458(11) fm. Subsequently, the hyperfine-splitting of charmonium and fDₛ are predicted to be 112(5) MeV and 254(5) MeV, respectively.
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