Flavour Singlet Mesons in Full QCD on the Lattice

Details Flavour Singlet Mesons in Full QCD on the Lattice Flavour Singlet Mesons in Full QCD on the Lattice

2002-01-07

arxiv.org/abs/hep-lat/0201009v1

Nucl.Phys.Proc.Suppl.109A:15-19,2002

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 8 Postscript figures

Scientific paper

10.1016/S0920-5632(02)01384-1

We apply spectral methods to compute the OZI-rule suppressed loop-loop correlators in the pseudoscalar meson flavour singlet channel. Using SESAM configurations (obtained with two degenerate sea quark flavours on 16x16x16x32 lattices at beta = 5.6 with standard Wilson action), we find for the first time clear evidence for mass plateau formation in the eta' channel of this theory. As a consequence, we observe a clear signal of a mass gap persistent under chiral extrapolation. This sets the stage for a more realistic two-channel approach, where partially quenched strange quarks would be included, in addition to u, d sea quarks.

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