% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Chambers:274917,
      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        = {{D}isconnected contributions to the spin of the nucleon},
      reportid     = {PUBDB-2015-03685, arXiv:1508.06856. ADP-15-29-T931.
                      DESY-15-156. Edinburgh-2015-21. LTH-105},
      year         = {2015},
      abstract     = {The spin decomposition of the proton is a long-standing
                      topic of much interest in hadronic physics. Lattice QCD has
                      had much success in calculating the connected contributions
                      to the quark spin. However, complete calculations, which
                      necessarily involve gluonic and strange-quark contributions,
                      still present some challenges. These 'disconnected'
                      contributions typically involve small signals hidden against
                      large statistical backgrounds and rely on computationally
                      intensive stochastic techniques. In this work we demonstrate
                      how a Feynman-Hellmann approach may be used to calculate
                      such quantities, by measuring shifts in the proton energy
                      arising from artificial modifications to the QCD action. We
                      find a statistically significant non-zero result for the
                      disconnected quark spin contribution to the proton of about
                      $-5\%$ at a pion mass of 470 MeV.},
      keywords     = {quark: spin (autogen) / nucleon: spin (autogen) / p: energy
                      (autogen) / quantum chromodynamics: action (autogen) /
                      background: statistical (autogen) / pi: mass (autogen) /
                      lattice field theory (autogen) / stochastic (autogen)},
      cin          = {T},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611)},
      pid          = {G:(DE-HGF)POF3-611},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)25 / PUB:(DE-HGF)15},
      eprint       = {1508.06856},
      howpublished = {arXiv:1508.06856},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1508.06856;\%\%$},
      url          = {https://bib-pubdb1.desy.de/record/274917},
}