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@ARTICLE{Hgler:860329,
      author       = {Hägler, Ph. and Negele, J. W. and Renner, D. B. and
                      Schroers, W. and Lippert, Th. and Schilling, K.},
      title        = {{M}oments of nucleon generalized parton distributions in
                      lattice {QCD}},
      journal      = {Physical review / D},
      volume       = {68},
      number       = {3},
      issn         = {0556-2821},
      address      = {Melville, NY},
      publisher    = {Inst.812068},
      reportid     = {FZJ-2019-01104},
      pages        = {034505},
      year         = {2003},
      abstract     = {Calculation of the moments of generalized parton
                      distributions in lattice QCD requires more powerful
                      techniques than those previously used to calculate the
                      moments of structure functions. Hence, we present a novel
                      approach that exploits the full information content from a
                      given lattice configuration by measuring an overdetermined
                      set of lattice observables to provide maximal statistical
                      constraints on the generalized form factors at a given
                      virtuality t. In an exploratory investigation using
                      unquenched QCD configurations at intermediate sea quark
                      masses, we demonstrate that our new technique is superior to
                      conventional methods and leads to reliable numerical signals
                      for the n=2 flavor singlet generalized form factors up to
                      3GeV2. The contribution from connected diagrams in the
                      flavor singlet sector to the total quark angular momentum is
                      measured to an accuracy of the order of $1\%.$},
      ddc          = {530},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/PhysRevD.68.034505},
      url          = {https://juser.fz-juelich.de/record/860329},
}