%0 Journal Article
%A Green, J. R.
%A Engelhardt, M.
%A Krieg, S.
%A Negele, J. W.
%A Pochinsky, A. V.
%A Syritsyn, S. N.
%T Nucleon structure from Lattice QCD using a nearly physical pion mass
%J Physics letters / B
%V 734
%@ 0370-2693
%C Amsterdam
%I North-Holland Publ.
%M FZJ-2014-03715
%P 290 - 295
%D 2014
%X We report the first Lattice QCD calculation using the almost physical pion mass mπ=149 MeVmπ=149 MeV that agrees with experiment for four fundamental isovector observables characterizing the gross structure of the nucleon: the Dirac and Pauli radii, the magnetic moment, and the quark momentum fraction. The key to this success is the combination of using a nearly physical pion mass and excluding the contributions of excited states. An analogous calculation of the nucleon axial charge governing beta decay has inconsistencies indicating a source of bias at low pion masses not present for the other observables and yields a result that disagrees with experiment.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000338943900054
%R 10.1016/j.physletb.2014.05.075
%U https://juser.fz-juelich.de/record/154367