QCD with dynamical fermions

E. Laermann, R. Altmeyer, K. D. Born, W. Ibes, R. Sommer, T. F. Walsh, P. M. Zerwas

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We present our latest hadron mass calculations for four flavors of staggered fermions on a 24 × 163 lattice at quark mass ma = 0.010 and β = 5.35. Our work clearly shows a systematic tendency for the nucleon to ρ{variant} meson mass ratio to decrease below the naive quark model value of 3 2 as the zero quark mass limit is approached. This completes an extensive study of hadron spectroscopy using the pseudofermion method at numerous quark mass values for β = 5.20 and β = 5.35. We also present initial results of our new Hybrid Monte Carlo analysis at β = 5.35 and ma = 0.025 on the 24 × 163 lattice. We discuss the performance of the algorithm on this lattice, and we measure hadron masses and the interquark potential. Where we can compare results, we find good agreement with our earlier pseudofermion calculations.

Original languageEnglish (US)
Pages (from-to)436-442
Number of pages7
JournalNuclear Physics B (Proceedings Supplements)
Issue numberC
StatePublished - Sep 1990

Bibliographical note

Funding Information:
*Research supported in part by DOE rant DE-AC-0240105, grants of the Minnesota Supercomputer In-stitute, the Minnesota Supercomputer Center Inc ., the Deutsche Forschungsgemeinschaft and the W . Bun- desministerium für Forschung und Technologie .


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