D. Adams et al., THE SPIN-DEPENDENT STRUCTURE-FUNCTION G(1)(X) OF THE DEUTERON FROM POLARIZED DEEP-INELASTIC MUON SCATTERING, Physics letters. Section B, 396(1-4), 1997, pp. 338-348
We present a new measurement of the spin-dependent structure function
g(1)(d) of the deuteron from deep inelastic scattering of 190 GeV pola
rized muons on polarized deuterons. The results are combined with our
previous measurements of g(1)(d). A perturbative QCD evolution in next
-to-leading order is used to compute g(1)(d)(x) at a constant Q(2). At
Q(2) = 10GeV(2), we obtain a first moment r(1)(d) = integral(0)(1)g(1
)(d)x=0.041 +/- 0.008, a flavour-singlet axial charge of the nucleon a
(0)=0.30 +/- 0.08, and an axial charge of the strange quark a(s)=-0.09
+/- 0.03. Using our earlier determination of Gamma(1)(p), we obtain G
amma(1)(p) - Gamma(1)(n)=0.183 +/- 0.035 at Q(2) = 10GeV(2). This resu
lt is in agreement with the Bjorken sum rule which predicts Gamma(1)(p
) - Gamma(1)(n)=0.186 +/- 0.002 at the same Q(2). (C) 1997 Published b
y Elsevier Science B.V.