Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1997-11-10
Nucl.Phys. A629 (1998) 235c-244c
Physics
High Energy Physics
High Energy Physics - Lattice
10 pages, latex source-file, 5 figures as epsf-file, uses espcrc1.sty. Invited talk at the International Conference on Quark L
Scientific paper
10.1016/S0375-9474(97)00693-3
The flavor singlet axial and tensor charges of the nucleon are calculated in lattice QCD. We find $\Delta\Sigma=\Delta u+\Delta d+\Delta s=+0.638(54)-0.347(46)-0.109(30) = +0.18(10)$ for the axial charge and $\delta\Sigma=\delta u+\delta d+\delta s=+0.839(60)-0.231(55)-0.046(34) = +0.562(88)$ for the tensor charge. The result for the axial charge shows reasonable agreement with the experiment and that for the tensor charge is the first prediction from lattice QCD before experimental measurements.
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