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Twisted valence quarks and hadron interactions on the lattice

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arxiv hep-lat/0412023 v2 pith:AEEB4I3S submitted 2004-12-14 hep-lat

classification hep-lat
keywords boundaryquarksconditionshadronlatticetwistedvalenceadvantages
verification ladder T0 review T1 audit T2 compute T3 formal
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We consider QCD with valence and sea quarks obeying different boundary conditions. We point out that the energy of low lying two hadron states do not depend on the boundary condition of the sea quarks (up to exponentially small corrections). Thus, the advantages in using twisted boundary conditions on the lattice QCD extraction of nucleon-nucleon phase shifts can be gained without the need of new gauge configurations, even in fully unquenched calculations.

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