Quarkonium mass splittings in three-flavor lattice QCD

Details Quarkonium mass splittings in three-flavor lattice QCD Quarkonium mass splittings in three-flavor lattice QCD

2009-12-14

arxiv.org/abs/0912.2701v1

Phys.Rev.D81:034508,2010

Physics

High Energy Physics

High Energy Physics - Lattice

21 pages, 17 figures

Scientific paper

10.1103/PhysRevD.81.034508

We report on calculations of the charmonium and bottomonium spectrum in lattice QCD. We use ensembles of gauge fields with three flavors of sea quarks, simulated with the asqtad improved action for staggered fermions. For the heavy quarks we employ the Fermilab interpretation of the clover action for Wilson fermions. These calculations provide a test of lattice QCD, including the theory of discretization errors for heavy quarks. We provide, therefore, a careful discussion of the results in light of the heavy-quark effective Lagrangian. By and large, we find that the computed results are in agreement with experiment, once parametric and discretization errors are taken into account.

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