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On the Dynamics of Light Wilson Quarks
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abstract
We describe recent results obtained as part of the High Energy Monte Carlo Grand Challenge (HEMCGC) project concerning the behaviour of lattice QCD with light dynamical Wilson quarks. We show that it is possible to reach regions of parameter space with light pions $m_\pi\ll0.2/a$, but that the equilibration time for such a system is at least of the order of 1,000 unit-length Hybrid Monte Carlo (HMC) trajectories (about a Gigaflop/sec-year). If the Hybrid Molecular Dynamics (HMD) algorithm is used with the same parameters it gives incorrect results.
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