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@ARTICLE{Dolgov:860328,
      author       = {Dolgov, D. and Brower, R. and Capitani, S. and Dreher, P.
                      and Negele, J. W. and Pochinsky, A. and Renner, D. B. and
                      Eicker, N. and Lippert, Th. and Schilling, K. and Edwards,
                      R. G. and Heller, U. M.},
      title        = {{M}oments of nucleon light cone quark distributions
                      calculated in full lattice {QCD}},
      journal      = {Physical review / D},
      volume       = {66},
      number       = {3},
      issn         = {0556-2821},
      address      = {Melville, NY},
      publisher    = {Inst.812068},
      reportid     = {FZJ-2019-01103},
      pages        = {034506},
      year         = {2002},
      abstract     = {Moments of the quark density, helicity, and transversity
                      distributions are calculated in unquenched lattice QCD.
                      Calculations of proton matrix elements of operators
                      corresponding to these moments through operator product
                      expansion have been performed on 163×32 lattices for Wilson
                      fermions at β=5.6 using configurations from the SESAM
                      Collaboration and at β=5.5 using configurations from SCRI.
                      One-loop perturbative renormalization corrections are
                      included. At quark masses accessible in present
                      calculations, there is no statistically significant
                      difference between quenched and full QCD results, indicating
                      that the contributions of quark-antiquark excitations from
                      the Dirac sea are small. The close agreement between
                      calculations with cooled configurations containing
                      essentially only instantons and the full gluon
                      configurations indicates that quark zero modes associated
                      with instantons play a dominant role. A naive linear
                      extrapolation of the full QCD calculation to the physical
                      pion mass yields results inconsistent with experiment. An
                      extrapolation to the chiral limit including the physics of
                      the pion cloud can resolve this discrepancy and the
                      requirements for a definitive chiral extrapolation are
                      described.},
      ddc          = {530},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/PhysRevD.66.034506},
      url          = {https://juser.fz-juelich.de/record/860328},
}