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@INPROCEEDINGS{Engelhardt:917416,
      author       = {Engelhardt, Michael and Green, Jeremy and Hasan, Nesreen
                      and Izubuchi, Taku and Kallidonis, Christos and Krieg,
                      Stefan and Liuti, Simonetta and Meinel, Stefan and Negele,
                      John and Pochinsky, Andrew and Rajan, Abha and Silvi,
                      Giorgio and Syritsyn, Sergey},
      title        = {{Q}uark spin-orbit correlations in the proton},
      publisher    = {Sissa Medialab Trieste, Italy},
      reportid     = {FZJ-2023-00630},
      pages        = {8},
      year         = {2022},
      comment      = {Proceedings of The 38th International Symposium on Lattice
                      Field Theory — PoS(LATTICE2021) - Sissa Medialab Trieste,
                      Italy, 2022. - ISBN - doi:10.22323/1.396.0413},
      booktitle     = {Proceedings of The 38th International
                       Symposium on Lattice Field Theory —
                       PoS(LATTICE2021) - Sissa Medialab
                       Trieste, Italy, 2022. - ISBN -
                       doi:10.22323/1.396.0413},
      abstract     = {Generalized transverse momentum-dependent parton
                      distributions (GTMDs) provide a comprehensive framework for
                      imaging the internal structure of the proton. In particular,
                      by encoding the simultaneous distribution of quark
                      transverse positions and momenta, they allow one to directly
                      access longitudinal quark orbital angular momentum, and,
                      moreover, to correlate it with the quark helicity. The
                      relevant GTMD is evaluated through a lattice calculation of
                      a proton matrix element of a quark bilocal operator (the
                      separation in which is Fourier conjugate to the quark
                      momentum)featuring a momentum transfer (which is Fourier
                      conjugate to the quark position), as well as the Dirac
                      structure appropriate for capturing the quark helicity. The
                      weighting by quark transverse position requires a derivative
                      with respect to momentum transfer, which is obtained in
                      unbiasedfashion using a direct derivative method. The
                      lattice calculation is performed directly at the physical
                      pion mass, using domain wall fermions to mitigate operator
                      mixing effects. Both the Jaffe-Manohar as well as the Ji
                      quark spin-orbit correlations are extracted, yielding
                      evidence for a strong quark spin-orbit coupling in the
                      proton.},
      month         = {Jul},
      date          = {2021-07-26},
      organization  = {The 38th International Symposium on
                       Lattice Field Theory,
                       Zoom/Gather@Massachusetts Institute of
                       Technology (USA), 26 Jul 2021 - 30 Jul
                       2021},
      cin          = {JSC},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511)},
      pid          = {G:(DE-HGF)POF4-5111},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.22323/1.396.0413},
      url          = {https://juser.fz-juelich.de/record/917416},
}