Probing the QCD vacuum with flavour singlet objects: η' on the lattice
T. Struckmann, K. Schilling, P. Ueberholz, N. Eicker, S. Guesken, Th. Lippert, H. Neff, B. Orth, J. Viehoff
Abstract
We present a study on the direct determination of the η' mass on the full set of SESAM and TχL QCD vacuum configurations with 2 active flavours of Wilson fermions, at β= 5.6. We observe a definite dependency of the two-loop correlator on the topological charge sector.
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