Physics of eta-prime with rooted staggered quarks
Abstract
The quark-mass dependence of the eta in the Schwinger model, which -- like the eta-prime in QCD -- becomes massive through the axial anomaly, is studied on the lattice with Nf=0,1,2. Staggered quarks are used, with a rooted determinant for Nf=1. In the chiral limit the Schwinger mass is reproduced, which suggests that the anomaly is being treated correctly.
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