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@ARTICLE{Bali:19010,
      author       = {Bali, G.S. and Collins, S. and Göckeler, M. and Horsley,
                      R. and Nakamura, Y. and Nobile, A. and Pleiter, D. and
                      Rakow, P.E.L. and Schäfer, A. and Schierholz, G. and
                      Zanotti, J.M.},
      title        = {{S}trangeness {C}ontribution to the {P}roton {S}pin from
                      {L}attice {QCD}},
      journal      = {Physical review letters},
      volume       = {108},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-19010},
      pages        = {222001},
      year         = {2012},
      note         = {This work is supported by the EU (Grant No. 238353, ITN
                      STRONGnet) and by the DFG Grant No. SFB/TR55. S. C.
                      acknowledges support from the Claussen-Simon-Foundation
                      (Stifterverband fur die Deutsche Wissenschaft) and J. Z.
                      from the Australian Research Council (Grant No.
                      FT100100005). Computations were performed on the SFB/TR55
                      QPACE supercomputers, the BlueGene/P (JuGene) and the
                      Nehalem Cluster (JuRoPA) of the Julich Supercomputer Center,
                      the IBM BlueGene/L at the EPCC (Edinburgh), the SGI Altix
                      ICE machines at HLRN (Berlin/Hannover), and Regensburg's
                      Athene HPC cluster. The CHROMA software suite [33] was used
                      and gauge configurations were generated with the BQCD code
                      [34].},
      abstract     = {We compute the strangeness and light-quark contributions
                      Delta s, Delta u, and Delta d to the proton spin in n(f) = 2
                      lattice QCD at a pion mass of about 285 MeV and at a lattice
                      spacing a approximate to 0.073 fm, using the
                      nonperturbatively improved Sheikholeslami-Wohlert Wilson
                      action. We carry out the renormalization of these matrix
                      elements, which involves mixing between contributions from
                      different quark flavors. Our main result is the small
                      negative value Delta s((MS) over bar)(root 7.4 GeV) =
                      -0.020(10)(4) of the strangeness contribution to the nucleon
                      spin. The second error is an estimate of the uncertainty,
                      due to the missing extrapolation to the physical point.},
      keywords     = {J (WoSType)},
      cin          = {JSC},
      ddc          = {550},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {Scientific Computing (FUEK411) / 411 - Computational
                      Science and Mathematical Methods (POF2-411) / STRONGNET -
                      Strong Interaction Supercomputing Training Network (238353)},
      pid          = {G:(DE-Juel1)FUEK411 / G:(DE-HGF)POF2-411 /
                      G:(EU-Grant)238353},
      shelfmark    = {Physics, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000304655800002},
      pubmed       = {pmid:23003587},
      doi          = {10.1103/PhysRevLett.108.222001},
      url          = {https://juser.fz-juelich.de/record/19010},
}