TY - JOUR
T1 - Nucleon strangeness form factors from Nf=2+1 clover fermion lattice QCD
AU - Doi, Takumi
AU - Deka, Mridupawan
AU - Dong, Shao Jing
AU - Draper, Terrence
AU - Liu, Keh Fei
AU - Mankame, Devdatta
AU - Mathur, Nilmani
AU - Streuer, Thomas
PY - 2009/11/10
Y1 - 2009/11/10
N2 - We present the Nf=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 GMs(0)=-0.017(25)(07) , where the first error is statistical, and the second is the uncertainties in Q2 and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error.
AB - We present the Nf=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 GMs(0)=-0.017(25)(07) , where the first error is statistical, and the second is the uncertainties in Q2 and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error.
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U2 - 10.1103/PhysRevD.80.094503
DO - 10.1103/PhysRevD.80.094503
M3 - Article
AN - SCOPUS:71549143494
SN - 1550-7998
VL - 80
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 9
M1 - 094503
ER -