The Singlet g_2 Structure Function in the Next-to-Leading Order

Details The Singlet g_2 Structure Function in the Next-to-Leading Order The Singlet g_2 Structure Function in the Next-to-Leading Order

2000-07-26

arxiv.org/abs/hep-ph/0007305v6

Phys.Rev. D63 (2001) 094012

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 3 figures, RevTeX4, some minor corrections

Scientific paper

10.1103/PhysRevD.63.094012

Following a previous study of the one-loop factorization of the nonsinglet $g_2$ structure function of the nucleon, we present in this paper the next-to-leading order coefficient functions in the singlet sector. To obtain the result, the partonic processes of virtual Compton scattering off two and three "on-shell" gluons are calculated. A key step in achieving the correct factorization is to separate the correct twist-two contribution. The Burkardt-Cottingham sum rule is nominally satisfied at this order.

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