arXiv:1301.7203·v1·High Energy Physics — Lattice
Precision tests of the J/psi from full lattice QCD: mass, leptonic width and radiative decay rate to eta_c
C. T. H. Davies🇬🇧 · G. C. Donald🇬🇧 · R. J. Dowdall🇬🇧 · J. Koponen🇬🇧 · E. Follana🇪🇸 · K. Hornbostel🇺🇸 · G. P. Lepage🇺🇸 · C. McNeile🇩🇪
Abstract
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.
Comments: 3 pages, 4 figures, Proceedings of Confinement2012