Precision tests of the J/psi from full lattice QCD: mass, leptonic width and radiative decay rate to etac
Abstract
We show results from calculations in full lattice QCD of the mass, leptonic width and radiative decay rate to etac of the J/psi meson. These provide few % tests of QCD. Another (1.5%) test comes from comparison of time-moments of the vector charmonium correlator with results derived from the experimental values of R(e+e- to hadrons) in the charm region.
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