The Y spectrum from lattice QCD with 2+1 flavors of dynamical quarks
- Gray, A.
- Davies, C.T.H.
- Alford, M.
- Follana, E.
- Hein, J.
- Lepage, G.R.
- Mason, Q.
- Nobes, M.A.
DOIAbstract
We describe the bottomonium spectrum obtained on the MILC configurations which incorporate 2+1 flavors of dynamical quarks. We compare to quenched and 2 flavor results also on MILC configurations. We show that the lattice spacing determination using different quantities shows clear signs of convergence with 2+1 flavors and give results for the leptonic width and hyperfine splitting, in the form of the ratio of the 1st excited state of the Y to that of the ground state
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