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@PHDTHESIS{Hasan:874258,
      author       = {Hasan, Nesreen},
      title        = {{A} lattice {QCD} study of nucleon structure with physical
                      quark masses},
      volume       = {41},
      school       = {Universität Wuppertal},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2020-01349},
      isbn         = {978-3-95806-456-0},
      series       = {Schriften des Forschungszentrums Jülich. Reihe IAS Series},
      pages        = {xiii, 157 S.},
      year         = {2020},
      note         = {Universität Wuppertal, 2019},
      abstract     = {In this work, we compute various nucleon structure
                      observables using the lattice regularization of quantum
                      chromodynamics, lattice QCD. Our calculations are performed
                      using 2 + 1-flavor ensembles with clover-improved Wilson
                      fermions and cover three sets of abserbales: The first set
                      includes the computation of nucleon isovector axial, scalar,
                      and tensor charges. In particular, we focus on controlling
                      the unwanted contributions from excited states. Those
                      charges quantify the coupling of nucleons to quark-level
                      interactions and play an important role in the analysis of
                      the Standard Model and Beyond the Standard Model (BSM)
                      physics. The second set of observables includes the nucleon
                      charge and axial radii measured using a new and
                      model-independent approach. We developed this approach to
                      enable the computation of the nucleon radii directly at zero
                      momentum transfer and avoid the systematic uncertainty
                      orginating from the large extrapolation commonly included in
                      the conventional methods used for measuring quantities like
                      the nucleon charge radius. Systematic errors of this kind
                      have been proposed as a possible explanation of the radius
                      puzzle which refers to the > 5$\sigma$ discrepancy between
                      the experimental electronic and muonic determinations of the
                      charge radius of the proton. We perform the calculations of
                      the nucleon charges and radii on two gauge ensembles at the
                      physical pion mass and with different lattice spacings. The
                      last set of our calculation is devoted to measuring the
                      nucleon axial form factors. This calculation includes both
                      quark-connected and -disconnected diagrams, which allows us
                      to determine the up, down, and strange form factors. This
                      calculation is done using a single ensemble with pion mass
                      317 MeV.},
      cin          = {JSC},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511) / PhD no Grant - Doktorand ohne besondere
                      Förderung (PHD-NO-GRANT-20170405)},
      pid          = {G:(DE-HGF)POF3-511 / G:(DE-Juel1)PHD-NO-GRANT-20170405},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:0001-2020012307},
      url          = {https://juser.fz-juelich.de/record/874258},
}