Special Research Centre for the Subatomic Structure of Matter publications

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Browsing Special Research Centre for the Subatomic Structure of Matter publications by Author "15th International Conference on Particles and Nuclei (10 Jun 1999 - 16 Jun 1999 : UPPSALA, SWEDEN)"

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    Chiral corrections to baryon masses calculated within lattice QCD
    (Elsevier Science BV, 2000) Thomas, A.; Leinweber, D.; Tsushima, K.; Wright, S.; 15th International Conference on Particles and Nuclei (10 Jun 1999 - 16 Jun 1999 : UPPSALA, SWEDEN)
    Consideration of the analytic properties of pion-induced baryon self energies leads to new functional forms for the extrapolation of light baryon masses. These functional forms reproduce the leading non-analytic behavior of chiral perturbation theory, the correct non-analytic behavior at the $N \pi$ threshold and the appropriate heavy-quark limit. They involve only three unknown parameters, which may be obtained by fitting lattice QCD data. Recent dynamical fermion results from CP-PACS and UKQCD are extrapolated using these new functional forms. We also use these functions to probe the limit of applicability of chiral perturbation theory.