Vector decay constants in quarkonia

Details Vector decay constants in quarkonia Vector decay constants in quarkonia

1998-09-10

arxiv.org/abs/hep-lat/9809067v2

Nucl.Phys.Proc.Suppl. 73 (1999) 330-332

Physics

High Energy Physics

High Energy Physics - Lattice

LATTICE98(heavyqk), typos in References corrected

Scientific paper

10.1016/S0920-5632(99)85063-4

Lattice NRQCD with leading finite lattice spacing errors removed is used to simulate heavy-heavy vector decay constants. Quenched simulations are performed at three values of the coupling and fifteen values of the quark mass. The improved gauge action with plaquettes and rectangles is used. Landau link improvement is used throughout. "Perturbative" and nonperturbative meson masses are compared. One-loop perturbative matching between lattice and continuum heavy-heavy vector currents is performed. The data is consistent with the vector meson decay constant being proportional to the square root of its mass.

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