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001     860316
005     20200914100707.0
024 7 _ |a 10.1103/PhysRevD.59.054504
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037 _ _ |a FZJ-2019-01091
082 _ _ |a 530
100 1 _ |a Güsken, S.
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245 _ _ |a Pion-nucleon σ term with dynamical Wilson fermions
260 _ _ |a Melville, NY
|c 1999
|b Inst.812068
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|b American Physical Society (APS)
|c 1999-02-03
264 _ 1 |3 print
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|b American Physical Society (APS)
|c 1999-02-01
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520 _ _ |a We calculate connected and disconnected contributions to the flavor singlet scalar density amplitude of the nucleon in a full QCD lattice simulation with nf=2 dynamical Wilson fermions at β=5.6 on a 163×32 lattice. We find that both contributions are of similar size at the light quark mass. We arrive at the estimate σπN=18(5)MeV. Its smallness is directly related to the apparent decrease of u, d quark masses when unquenching QCD lattice simulations. The y parameter can be estimated from a semi-quenched analysis, in which there are no strange quarks in the sea, the result being y=0.59(13).
542 _ _ |i 1999-02-03
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700 1 _ |a Ueberholz, P.
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700 1 _ |a Viehoff, J.
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700 1 _ |a Eicker, N.
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700 1 _ |a Lacock, P.
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700 1 _ |a Lippert, T.
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700 1 _ |a Schilling, K.
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700 1 _ |a Spitz, A.
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700 1 _ |a Struckmann, T.
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773 1 8 |a 10.1103/physrevd.59.054504
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|t Physical Review D
|v 59
|y 1999
|x 0556-2821
773 _ _ |a 10.1103/PhysRevD.59.054504
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