TY - JOUR
T1 - High-precision calculation of the strange nucleon electromagnetic form factors
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
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/8/26
Y1 - 2015/8/26
N2 - We report a direct lattice QCD calculation of the strange nucleon electromagnetic form factors GEs and GMs in the kinematic range 0≤Q21.2GeV2. For the first time, both GEs and GMs 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.
AB - We report a direct lattice QCD calculation of the strange nucleon electromagnetic form factors GEs and GMs in the kinematic range 0≤Q21.2GeV2. For the first time, both GEs and GMs 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.
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U2 - 10.1103/PhysRevD.92.031501
DO - 10.1103/PhysRevD.92.031501
M3 - Article
AN - SCOPUS:84940847332
SN - 1550-7998
VL - 92
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 3
M1 - 031501
ER -