Precision Charmonium Spectroscopy From Lattice QCD
C. T. H. Davies, K. Hornbostel, G. P. Lepage, A. J. Lidsey, J. Shigemitsu, J. Sloan
Abstract
We present results for Charmonium spectroscopy using Non-Relativistic QCD (NRQCD). For the NRQCD action the leading order spin-dependent and next to leading order spin-independent interactions have been included with tadpole-improved coefficients. We use multi-exponential fits to multiple correlation functions to extract ground and excited S states. Splittings between the lowest S, P and D states are given and we have accurate values for the S state hyperfine splitting and the χc fine structure. Agreement with experiment is good - the remaining systematic errors are discussed.
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