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Effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shanahan, H. P. Davies, C. T. H. Kenway, R. D. Richards, D. G. Rowland, Pamela A. Ryan, Sinéad M. |
| Copyright Year | 1997 |
| Abstract | We compute the light-hadron mass spectrum at b55.7 using theO(a)-improved Sheikholeslami-Wohlert fermion action with two choices of the clover coefficient: the classical value c51 and a mean-field or tadpole-improved estimate c51.57. We compare our results with those of the GF11 Collaboration who use the Wilson fermion action ( c50). We find that changingc 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 D, a d also in the Edinburgh plot. A number of other quantities, for example, mV 2mP 2 , J, amK /amr , and amK* /amr do not appear to change significantly. We also investigate the effect of changing the lattice volume from approximately~2 fm! to ~2.6 fm!. We find that the meson masses are consistent to within one standard deviation and baryon masses are consistent to within two standard deviations. @S0556-2821 ~97!04803-0# |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.tara.tcd.ie/bitstream/handle/2262/22881/Effect%20of%20tree-level%20and%20mean-field%20improvement%20on%20the%20light-hadron%20spectrum%20in%20quenched%20QCD.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Arabic numeral 0 Choice Behavior Coefficient Extrapolation Fermion doubling Lattice QCD Mass Spectrometry Mesons Nucleons Quantity Quenched approximation |
| Content Type | Text |
| Resource Type | Article |
