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Quarkonium mass splittings with Fermilab heavy quarks and 2+1 flavors of improved staggered sea quarks

We present results from an ongoing lattice study of the lowest lying charmonium and bottomonium level splittings using the Fermilab heavy quark formalism. Our objective is to test the performance of this action on MILC-collaboration ensembles of (2+1) flavors of light improved staggered (asqtad) quarks. Measurements are done on 16 ensembles with degenerate up and down quarks of various masses, thus permitting a chiral extrapolation, and over lattice spacings ranging from 0.09 fm to 0.18 fm, thus permitting study of lattice-spacing dependence. We examine combinations of the mass splittings that are sensitive to components of the effective quarkonium potential.

preprint2009arXivOpen access
T. BurchC. E. DeTarM. Di PierroA. X. El-KhadraSteven GottliebA. S. KronfeldL. LevkovaP. B. MackenzieJ. Simone
hep-lat
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T. BurchC. E. DeTarM. Di PierroA. X. El-KhadraSteven GottliebA. S. KronfeldL. LevkovaP. B. MackenzieJ. Simone

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