1996/08/31 by UKQCD Collaboration, Hugh Shanahan, H. P. Shanahan +16 · 7 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.1103/physrevd.55.1548
published as Phys.Rev.D55:1548-1558,1997 · 30 pages (26 pages without figures). LaTeX (2.09 compatible) Uses Revtex style files plus epsf.sty (epsf is optional, but is the default). Accepted for publication in Phys. Rev. D.. A few inaccurate statements on the clover coefficient have been corrected
arxiv created 1997/01/07 · openalex publication_date 1997/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We compute the light-hadron mass spectrum at \ensuremathβ=5.7 using the O(a)-improved Sheikholeslami-Wohlert fermion action with two choices of the clover coefficient: the classical value c=1 and a mean-field or tadpole-improved estimate c=1.57. We compare our results with those of the GF11 Collaboration who use the Wilson fermion action (c=0). We find that changing c from zero to 1 and 1.57 leads to significant differences in the masses of the chirally extrapolated and strange pseudoscalar and vector mesons, the nucleon, the \ensuremathΔ, and also in the Edinburgh plot. A number of other quantities, for example, mV2\ensuremath-mP2, J, amK/am_\ensuremathρ, and am_K*/am_\ensuremathρ do not appear to change significantly. We also investigate the effect of changing the lattice volume from approximately (2 fm)3 to (2.6 fm)3. We find that the meson masses are consistent to within one standard deviation and baryon masses are consistent to within two standard deviations.