Nucleon strangeness form factors from clover fermion lattice QCD
T Doi, M Deka, SJ Dong, T Draper, KF Liu… - Physical Review D …, 2009 - APS
Physical Review D—Particles, Fields, Gravitation, and Cosmology, 2009•APS
We present the N f= 2+ 1 clover fermion lattice QCD calculation of the nucleon strangeness
form factors. We evaluate disconnected insertions using the Z (4) stochastic method, along
with unbiased subtractions from the hopping parameter expansion. We find that increasing
the number of nucleon sources for each configuration improves the signal significantly. We
obtain GM s (0)=-0.017 (25)(07), where the first error is statistical, and the second is the
uncertainties in Q 2 and chiral extrapolations. This is consistent with experimental values …
form factors. We evaluate disconnected insertions using the Z (4) stochastic method, along
with unbiased subtractions from the hopping parameter expansion. We find that increasing
the number of nucleon sources for each configuration improves the signal significantly. We
obtain GM s (0)=-0.017 (25)(07), where the first error is statistical, and the second is the
uncertainties in Q 2 and chiral extrapolations. This is consistent with experimental values …
We present the clover fermion lattice QCD calculation of the nucleon strangeness form factors. We evaluate disconnected insertions using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. We find that increasing the number of nucleon sources for each configuration improves the signal significantly. We obtain , where the first error is statistical, and the second is the uncertainties in and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error.
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