TY  - JOUR
AU  - Green, Jeremy
AU  - Meinel, Stefan
AU  - Engelhardt, Michael
AU  - Krieg, Stefan
AU  - Laeuchli, Jesse
AU  - Negele, John
AU  - Orginos, Kostas
AU  - Pochinsky, Andrew
AU  - Syritsyn, Sergey
TI  - High-precision calculation of the strange nucleon electromagnetic form factors
JO  - Physical review / D
VL  - 92
IS  - 3
SN  - 1550-7998
CY  - [S.l.]
PB  - Soc.
M1  - FZJ-2015-05432
SP  - 031501
PY  - 2015
AB  - We report a direct lattice QCD calculation of the strange nucleon electromagnetic form factors $G_E^s$ and $G_M^s$ in the kinematic range 0≤Q²≲1.2GeV². For the first time, both $G_E^s$ and $G_M^s$ are shown to be nonzero with high significance. This work uses closer-to-physical lattice parameters than previous calculations, and achieves an unprecedented statistical precision by implementing a recently proposed variance reduction technique called hierarchical probing. We perform model-independent fits of the form factor shapes using the z-expansion and determine the strange electric and magnetic radii and magnetic moment. We compare our results to parity-violating electron-proton scattering data and to other theoretical studies.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000362218000001
DO  - DOI:10.1103/PhysRevD.92.031501
UR  - https://juser.fz-juelich.de/record/203512
ER  -