Parity Realization in Lattice QCD with Ginsparg-Wilson Fermions

Details Parity Realization in Lattice QCD with Ginsparg-Wilson Fermions Parity Realization in Lattice QCD with Ginsparg-Wilson Fermions

2010-04-20

arxiv.org/abs/1004.3463v2

JHEP 1007:047,2010

Physics

High Energy Physics

High Energy Physics - Lattice

14 pages. References added

Scientific paper

10.1007/JHEP07(2010)047

The Vafa-Witten arguments on the realization of parity and flavour symmetries in the QCD vacuum do not apply to two lattice regularizations of QCD which are able to reproduce the chiral anomaly: Wilson fermions and Ginsparg-Wilson fermions. We show here how using the last regularization one can get, from first principles, that the more standard order parameters for these symmetries take a vanishing vacuum expectation value for any number of flavours, if quarks have a non-vanishing mass.

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