Charmonium Spectrum from Quenched QCD with Overlap Fermions

S. Tamhankar; A. Alexandru; Y. Chen; S. J. Dong; T. Draper; I. Horvath; F. X. Lee; K. F. Liu; N. Mathur; J. B. Zhang

doi:10.1016/j.nuclphysbps.2004.11.253

paper

Charmonium Spectrum from Quenched QCD with Overlap Fermions

arXiv:hep-lat/0409128 · doi:10.1016/j.nuclphysbps.2004.11.253

Abstract

We present preliminary results using overlap fermions for the charmonium spectrum, in particular for hyperfine splitting. Simulations are performed on $1 6^{3} \times 72$ lattices, with Wilson gauge action at $I^^{2} = 6.3345$ . Depending on how the scale is set, we obtain 104(5) MeV (using $1 P ˉ - 1 S ˉ$ ) or 88(4) MeV (using $r_{0}$ =0.5 fm) for the hyperfine splitting.

3 pages, 5 fiugres. Talk presented at Lattice 2004 (heavy)