NUCLEON SPIN STRUCTURES FROM LATTICE QCD - FLAVOR SINGLET AXIAL AND TENSOR CHARGES

Authors
KURAMASHI Y
Citation
Y. Kuramashi, NUCLEON SPIN STRUCTURES FROM LATTICE QCD - FLAVOR SINGLET AXIAL AND TENSOR CHARGES, Nuclear physics. A, 629(1-2), 1998, pp. 235-244
Citations number
27
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. A → ACNP
ISSN journal
03759474
Volume
629
Issue
1-2
Year of publication
1998
Pages
235 - 244
Database
ISI
SICI code
0375-9474(1998)629:1-2<235:NSSFLQ>2.0.ZU;2-5
Abstract
The flavor singlet axial and tensor charges of the nucleon are calcula ted 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 ax ial charge shows reasonable agreement with the experiment and that for the tensor charge is the first prediction from lattice QCD before exp erimental measurements.