Nuclear effects in spin structure function g(1A)(x, Q(2)) at small x in deep inelastic scattering on Li-7 and He-3

摘要

We study the effects of nuclear shadowing and the subsequent enhancement for the spin structure function g(1A)(x, Q(2)) in polarized DIS on Li-7 and He-3. These effects are found to be quite significant. - the magnitude of nuclear shadowing at x approximate to 10(-3) is of order 16% for g(1A=7)(n.s.3/2)(x, Q(2))/g(1N)(n.s.)(x, Q(2)) and 10% for g(1A=3)(n.s) (x, Q(2))/g(1N)(n.s.)(x, Q(2)); the enhaslcement at x approximate to 0.125 (0.15) is of order 20 (55)% for g(1A=7)(n.s.3/2)(x, Q(2))/g(1N)(n.s.)(x, Q(2)) and 14 (40)% for g(1A=3)(n.s)(x, Q(2))/g(1N)(n.s).(x, Q(2)). [References: 8]