K. Ackerstaff et al., MEASUREMENT OF THE NEUTRON SPIN STRUCTURE-FUNCTION G(1)(N) WITH A POLARIZED HE-3 INTERNAL TARGET, Physics letters. Section B, 404(3-4), 1997, pp. 383-389
Results are reported from the HERMES experiment at HERA on a measureme
nt of the neutron spin structure function g(1)(n)(x, Q(2)) in deep ine
lastic scattering using 27.5 GeV longitudinally polarized positrons in
cident on a polarized He-3 internal gas target. The data cover the kin
ematic range 0.023 < x < 0.6 and 1 (GeV/c)(2) < Q(2) < 15 (GeV/c)(2).
The integral integral(0.023)(0.16)g(1)(n)(x) dx evaluated at a fixed Q
(2) of 2.5 (GeV/c)(2) is -0.034+/-0.013(stat.)+/-0.005(syst.). Assumin
g Regge behavior at low x, the first moment Gamma(1)(n) = integral(0)(
1)g(1)(n)(x) dx is +/-0.013(stat.)+/-0.005(syst.)+/-0.006(extrapol.).
(C) 1997 Published by Elsevier Science B.V.