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@ARTICLE{Chambers:201117,
      author       = {Chambers, A. J. and Horsley, R. and Nakamura, Y. and
                      Perlt, H. and Pleiter, D. and Rakow, P. E. L. and
                      Schierholz, G. and Schiller, A. and Stüben, H. and Young,
                      R. D. and Zanotti, J. M.},
      title        = {{F}eynman-{H}ellmann approach to the spin structure of
                      hadrons},
      journal      = {Physical review / D},
      volume       = {90},
      number       = {1},
      issn         = {1550-7998},
      address      = {[S.l.]},
      publisher    = {Soc.},
      reportid     = {FZJ-2015-03422},
      pages        = {014510},
      year         = {2014},
      abstract     = {We perform a Nf=2+1 lattice QCD simulation to determine the
                      quark spin fractions of hadrons using the Feynman-Hellmann
                      theorem. By introducing an external spin operator to the
                      fermion action, the matrix elements relevant for quark spin
                      fractions are extracted from the linear response of the
                      hadron energies. Simulations indicate that the
                      Feynman-Hellmann method offers statistical precision that is
                      comparable to the standard three-point function approach,
                      with the added benefit that it is less susceptible to
                      excited-state contamination. This suggests that the
                      Feynman-Hellmann technique offers a promising alternative
                      for calculations of quark line disconnected contributions to
                      hadronic matrix elements. At the SU(3)-flavor symmetry
                      point, we find that the connected quark spin fractions are
                      universally in the range $55\%–70\%$ for vector mesons and
                      octet and decuplet baryons. There is an indication that the
                      amount of spin suppression is quite sensitive to the
                      strength of SU(3) breaking.},
      cin          = {JSC / NIC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JSC-20090406 / I:(DE-Juel1)NIC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511) / Hadron physics using background fields
                      $(hlz22_20161101)$ / Disconnected Contributions to Matrix
                      Elements and Renormalization factors $(hde12_20141101)$},
      pid          = {G:(DE-HGF)POF3-511 / $G:(DE-Juel1)hlz22_20161101$ /
                      $G:(DE-Juel1)hde12_20141101$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000341261900008},
      doi          = {10.1103/PhysRevD.90.014510},
      url          = {https://juser.fz-juelich.de/record/201117},
}