1301.7203 (C. T. H. Davies et al.)

Precision tests of the J/psi from full lattice QCD: mass, leptonic width
and radiative decay rate to eta_c    [PDF]

C. T. H. Davies, G. C. Donald, R. J. Dowdall, J. Koponen, E. Follana, K. Hornbostel, G. P. Lepage, C. McNeile

We show results from calculations in full lattice QCD of the mass, leptonic width and radiative decay rate to eta_c 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.

View original: http://arxiv.org/abs/1301.7203