Dong, YB (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
The Nachtmann moment is employed to study the contribution of twist-3 operator to the nucleon spin structure functions. Target mass corrections to the Comwall-Norton moments of the spin structure functions g(1.2) are discussed. It is found that the corrections play a sizeable role to the contribution of the twist-3 (d) over bar (2) extracted from the Comwall-Norton moments. (c) 2007 Elsevier B.V. All rights reserved.