Unquenched Charmonium with NRQCD - Lattice 2000

Details Unquenched Charmonium with NRQCD - Lattice 2000 Unquenched Charmonium with NRQCD - Lattice 2000

2000-10-10

arxiv.org/abs/hep-lat/0010015v1

Nucl.Phys.Proc.Suppl. 94 (2001) 375-378

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2000 (Heavy Quark Physics)

Scientific paper

10.1016/S0920-5632(01)00979-3

We present results from a series of NRQCD simulations of the charmonium system, both in the quenched approximation and with n_f = 2 dynamical quarks. The spectra show evidence for quenching effects of ~10% in the S- and P-hyperfine splittings. We compare this with other systematic effects. Improving the NRQCD evolution equation altered the S-hyperfine by as much as 20 MeV, and we estimate radiative corrections may be as large as 40%.

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