THE NUCLEON AXIAL ISOSCALAR COUPLING AND FIRST MOMENTS OF P-SPIN, N-SPIN, D-SPIN STRUCTURE FUNCTIONS

Authors
LIU JP JIAN Z JIN YP
Citation
Jp. Liu et al., THE NUCLEON AXIAL ISOSCALAR COUPLING AND FIRST MOMENTS OF P-SPIN, N-SPIN, D-SPIN STRUCTURE FUNCTIONS, Communications in Theoretical Physics, 26(1), 1996, pp. 85-96
Citations number
50
Categorie Soggetti
Physics
Journal title
Communications in Theoretical Physics → ACNP
ISSN journal
02536102
Volume
26
Issue
1
Year of publication
1996
Pages
85 - 96
Database
ISI
SICI code
0253-6102(1996)26:1<85:TNAICA>2.0.ZU;2-N
Abstract
The nucleon coupling constant to the axial isoscalar current, g(A)(s), is calculated in the framework of QCD sum rules by including the effe cts of the three-gluon condensates. The contribution from the polarize d strange sea quarks to g(A)(s) is extracted in a constituent quark mo del with a QCD modification. The combined resultant theoretical value, g(A)(s) = 0.60+/-0.20, agrees with the experimental estimate. The fir st moments of the proton, neutron and deuteron spin structure function s are evaluated and compared with the experimental data.