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Schierholz, G.; Teper, M.; Gilchrist, J.P.; Schneider, H.
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)1983
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)1983
AbstractAbstract
[en] We calculate meson and baryon masses in quenched QCD for the small quark masses of phenomenological interest on a 103x16 lattice. We use Kogut-Susskind fermions which possess an explicit continuous chiral symmetry. We verify that this chiral symmetry is spontaneously broken and that for the physics involved our lattice is effectively of infinite volume at the quark masses we calculate. We verify msub(π)2 proportional msub(q), which is what one expects for a Goldstone pion. For Λsub(mom) = 200 MeV, which appears to be the consistent scale of quenched QCD, we find msub(q) approx.= 7 MeV and the hadron masses msub(rho) = (730 +- 90) MeV, msub(A1) = (1190 +- 90) MeV, msub(epsilon) = (660 +- 50) MeV and msub(N) = (920 +- 100) MeV. We also extract fsub(π)approx.=134 MeV. In physical units our lattice is 3 fermi across. (orig.)
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Sep 1983; 18 p; LAPP-TH--88
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