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000860323 1001_ $$0P:(DE-HGF)0$$aStruckmann, T.$$b0
000860323 245__ $$aFlavor singlet pseudoscalar masses in N f = 2 QCD
000860323 260__ $$aMelville, NY$$bInst.812068$$c2001
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000860323 520__ $$aWe perform a lattice mass analysis in the flavor singlet pseudoscalar channel on the SESAM and TχL full QCD vacuum configurations, with 2 active flavors of dynamical Wilson fermions at β=5.6. At our inverse lattice spacing, a−1≈2.3 GeV, we retrieve by a chiral extrapolation to the physical light quark masses the value mη′=3.7+8−4mπ. A crude extrapolation from (Nf=3) phenomenology would suggest mη′≈5.1mπ for Nf=2 QCD. We verify that the mass gap between the singlet state η′ and the π flavor triplet state is due to gauge configurations with nontrivial topology.
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000860323 7001_ $$0P:(DE-HGF)0$$aSchilling, K.$$b1
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000860323 7001_ $$0P:(DE-HGF)0$$aSchroers, W.$$b8
000860323 7001_ $$0P:(DE-HGF)0$$aViehoff, J.$$b9
000860323 7001_ $$0P:(DE-HGF)0$$aUeberholz, P.$$b10
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