1997/06/04 by UKQCD Collaboration, I.T. Drummond, T. Manke +5 · 23 citations
Physics and Astronomy · #Gauge (firearms) #High-Energy Particle Collisions Research #Hyperfine structure #Invariant (physics) #Inverse #Lattice (music) #Lattice QCD #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Spectrum (functional analysis) #hep-lat
paper · pdf · doi:10.1016/s0370-2693(97)00813-7
published in Physics Letters B 408(1-4), 308-314 (Elsevier BV) · 11 pages, LaTeX2e , 4 figures, uses styles [11pt, a4wide, epsf]. A minor typo in figure 2 has been corrected
arxiv created 1997/06/04 · openalex publication_date 1997/09/01 · arxiv updated 2015/06/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We explore the effect of higher order operators in the non-relativistic formulation of QCD (NRQCD). We calculated masses in the b b spectrum using quenched gauge configurations at beta = 6.0 and two different NRQCD actions which have been corrected to order mv4 and mv6. The two-point functions are calculated in a gauge invariant fashion. We find the general structure of the spectrum to be the same in the two cases. Using the P - 3S1 splitting we determine the inverse lattice spacings to be 2.44(4) GeV and 2.44(5) GeV for the mv4 and mv6 actions, respectively. We do observe shifts in the spin splittings. The hyperfine splitting is reduced by approximately 4 MeV, while the fine splitting is down by up to 10 MeV, albeit with large statistical errors.