TY  - JOUR
AU  - Struckmann, T.
AU  - Schilling, K.
AU  - Bali, G.
AU  - Eicker, N.
AU  - Güsken, S.
AU  - Lippert, Th.
AU  - Neff, H.
AU  - Orth, B.
AU  - Schroers, W.
AU  - Viehoff, J.
AU  - Ueberholz, P.
TI  - Flavor singlet pseudoscalar masses in N f = 2 QCD
JO  - Physical review / D
VL  - 63
IS  - 7
SN  - 0556-2821
CY  - Melville, NY
PB  - Inst.812068
M1  - FZJ-2019-01098
SP  - 074503
PY  - 2001
AB  - We 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/PhysRevD.63.074503
UR  - https://juser.fz-juelich.de/record/860323
ER  -