TY  - JOUR
AU  - Green, J. R.
AU  - Engelhardt, M.
AU  - Krieg, S.
AU  - Negele, J. W.
AU  - Pochinsky, A. V.
AU  - Syritsyn, S. N.
TI  - Nucleon structure from Lattice QCD using a nearly physical pion mass
JO  - Physics letters / B
VL  - 734
SN  - 0370-2693
CY  - Amsterdam
PB  - North-Holland Publ.
M1  - FZJ-2014-03715
SP  - 290 - 295
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000338943900054
DO  - DOI:10.1016/j.physletb.2014.05.075
UR  - https://juser.fz-juelich.de/record/154367
ER  -