Probing the QCD vacuum with flavour singlet objects: $eta$ on the lattice


الملخص بالإنكليزية

We present a study on the direct determination of the $eta $ mass on the full set of SESAM and T$chi$L QCD vacuum configurations with 2 active flavours of Wilson fermions, at $beta = 5.6$. We observe a definite dependency of the two-loop correlator on the topological charge sector.

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