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@ARTICLE{Stokes:890127,
      author       = {Stokes, Finn and Kamleh, Waseem and Leinweber, Derek B.},
      title        = {{E}lastic form factors of nucleon excitations in lattice
                      {QCD}},
      journal      = {Physical review / D},
      volume       = {102},
      number       = {1},
      issn         = {2470-0010},
      address      = {Melville, NY},
      publisher    = {Inst.812068},
      reportid     = {FZJ-2021-00716},
      pages        = {014507},
      year         = {2020},
      abstract     = {First principles calculations of the form factors of baryon
                      excitations are now becoming accessible through advances in
                      lattice-QCD techniques. In this paper, we explore the
                      utility of the parity-expanded variational analysis (PEVA)
                      technique in calculating the Sachs electromagnetic form
                      factors for excitations of the proton and neutron. We study
                      the two lowest-lying odd-parity excitations and demonstrate
                      that at heavier quark masses, these states are dominated by
                      behavior consistent with constituent quark models for the
                      N∗(1535) and N∗(1650), respectively. We also study the
                      lowest-lying localized even-parity excitation and find that
                      its form factors are consistent with a radial excitation of
                      the ground-state nucleon. A comparison of the results from
                      the PEVA technique with those from a conventional
                      variational analysis exposes the necessity of the PEVA
                      approach in baryon excited-state studies.},
      cin          = {JSC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511)},
      pid          = {G:(DE-HGF)POF3-511},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000548448400002},
      doi          = {10.1103/PhysRevD.102.014507},
      url          = {https://juser.fz-juelich.de/record/890127},
}