Improving the kinetic couplings in lattice nonrelativistic QCD

We improve the nonrelativistic QCD (NRQCD) action by comparing the dispersion relation to that of the continuum through O(p6) in perturbation theory. The one-loop matching coefficients of the O(p4) kinetic operators are determined, as well as the scale at which to evaluate αs in the V-scheme for eac...

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Veröffentlicht in:	Physical review. D 2019-03, Vol.99 (5), Article 054502
Hauptverfasser:	Davies, Christine T. H., Harrison, Judd, Hughes, Ciaran, Horgan, Ronald R., von Hippel, Georg M., Wingate, Matthew
Format:	Artikel
Sprache:	eng
Schlagworte:	Boundary conditions Couplings Perturbation theory PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Quantum chromodynamics Quarks
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