First results from the UKQCD collaboration

Allton, Chris; Duong, Hoa Dung Ha; Sachrajda, C.T.; Barbour, I.M.; Bell, A. J.; Davies, C. T. H.; Hands, Simon; Klepfish, E.G.; Baxter, Rob; Booth, Stephen; Bowler, K.C.; Collins, Sara; Henty, David; Kenway, R.D.; McNeile, Craig; Pendleton, B.J.; Richards, Daniel R.; Simone, J. N.; Simpson, Alicia; Wilkes, B.E.; Bottomley, J.E.J.; Catterall, Simon; Devlin, F.R.; Drummond, I.T.; Horgan, R.R.; Decker, Karsten M.; Hulsebos, Arjan; Irving, A.C.; McKerrell, A.; Michael, C.; Prisznyak, M.; Stephenson, P.; Martinelli, G.; Teper, M.; Wheater, J.F.

doi:10.1016/0920-5632(92)90238-n

Cited by 15 publications

(30 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the clover term is of this form, naively one would then expect that increasing the size of clover coefficient would reduce this discrepancy at least for heavy-light systems. Tentative comparisons with the c = 0 and c = 1 actions at β = 6.2 with low statistics indicated that the fall off in the splitting had decreased [3].…”

Section: Mass Splittingsmentioning

confidence: 99%

“…The gauge configurations were separated by 100 compound sweeps, where a compound sweep is defined as five OR sweeps followed by one CM sweep. A detailed description of the algorithms used can be found in [3].…”

Section: A Simulation Parametersmentioning

confidence: 99%

“…Local sinks were used for all propagators. The propagators were calculated using the minimal residual algorithm, which is described in detail in [3].…”

Section: A Simulation Parametersmentioning

confidence: 99%

See 2 more Smart Citations

Effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD

et al. 1997

Self Cite

View full text Add to dashboard Cite

We compute the light-hadron mass spectrum at ␤ϭ5.7 using the O(a)-improved Sheikholeslami-Wohlert fermion action with two choices of the clover coefficient: the classical value cϭ1 and a mean-field or tadpole-improved estimate cϭ1.57. We compare our results with those of the GF11 Collaboration who use the Wilson fermion action (cϭ0). 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 ⌬, and also in the Edinburgh plot. A number of other quantities, for example, m V 2 Ϫm P 2 , J, am K /am , and am K* /am do not appear to change significantly. We also investigate the effect of changing the lattice volume from approximately ͑2 fm͒ 3 to ͑2.6 fm͒ 3. We find that the meson masses are consistent to within one standard deviation and baryon masses are consistent to within two standard deviations.

show abstract

Section: Mass Splittingsmentioning

confidence: 99%

Section: A Simulation Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD

et al. 1997

Self Cite

View full text Add to dashboard Cite

show abstract

“…The discrepancy between the lattice and experimental results may, at least partially, be ascribed to quenching effects, as has been argued in ref. [64]. [10] prop., SW 0.488 ± 0.006 0.508 ± 0.028 [56] experiment Table 11: Our value for the B * − B and B * s − B s mass splittings compared to other simulations and experiment.…”

Section: The λ B − B Splittingmentioning

confidence: 99%

Heavy quark spectroscopy and matrix elements: A lattice study using the static approximation

et al. 1996

Self Cite

View full text Add to dashboard Cite

We present results of a lattice analysis of the B parameter B B , the decay constant f B , and several mass splittings using the static approximation. Results were obtained for 60 quenched gauge configurations computed at ␤ϭ6.2 on a lattice size of 24 3 ϫ48. Light quark propagators were calculated using the O(a)-improved Sheikholeslami-Wohlert action. We findcorresponding to B B static ϭ1.02 Ϫ6 Ϫ2 ϩ5 ϩ3 , f B static ϭ266 Ϫ20 Ϫ27 ϩ18 ϩ28 MeV, and f B s 2 B B s / f B 2 B B ϭ1.34 Ϫ8 Ϫ3 ϩ9 ϩ5 , where a variational fitting technique was used to extract f B static . For the mass splittings we obtain M B s ϪM B d ϭ87 Ϫ12 Ϫ12 ϩ15 ϩ6 MeV, M ⌳ b ϪM B d ϭ420 Ϫ90 Ϫ30 ϩ100 ϩ30 MeV, and M B* 2 ϪM B 2 ϭ0.281 Ϫ16 Ϫ37 ϩ15 ϩ40 GeV 2 . We compare different smearing techniques in-tended to improve the signal/noise ratio. From a detailed assessment of systematic effects, we conclude that the main systematic uncertainties are associated with the renormalization constants relating a lattice matrix element to its continuum counterpart. The dependence of our findings on lattice artifacts is to be investigated in the future. ͓S0556-2821͑96͒04715-7͔

show abstract

“…During the past several years there has been renewed interest in the use of improved lattice actions. Many calculations have been done using the so-called clover action [1,2,3] motivated by the pioneering work of Sheikholeslami and Wohlert [4]. Recently the move toward improved actions has been given even more impetus by the work of Lepage and co-workers [5,6] which suggests that with tadpole improvement [7], calculations can be done quite accurately even on rather coarse lattices.…”

Section: Introductionmentioning

confidence: 99%

Light hadron masses with a tadpole-improved next-nearest-neighbour lattice fermion action

Fiebig

Woloshyn

1996

Physics Letters B

View full text Add to dashboard Cite

Calculations of hadron masses are done in quenched approximation using gauge field and fermion actions which are both corrected for discretization errors to O(a 2 ) at the classical level and which contain tadpole improvement factors. The fermion action has both nearest-neighbour and next-nearestneighbour couplings in the kinetic and Wilson terms. Simulations done at lattice spacings of 0.27 and 0.4fm yield hadron masses which are already quite close to experimental values. The results are compared to Wilson action calculations done at comparable lattice spacings.

show abstract

First results from the UKQCD collaboration

Cited by 15 publications

References 6 publications

Effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD

Effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD

Heavy quark spectroscopy and matrix elements: A lattice study using the static approximation

Light hadron masses with a tadpole-improved next-nearest-neighbour lattice fermion action

Contact Info

Product

Resources

About