Singlet g(2) structure function in the next-to-leading order - art. no. 094012

Authors
Belitsky, AV Ji, XD Lu, W Osborne, J
Citation
Av. Belitsky et al., Singlet g(2) structure function in the next-to-leading order - art. no. 094012, PHYS REV D, 6309(9), 2001, pp. 4012
Citations number
34
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6309
Issue
9
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010501)6309:9<4012:SGSFIT>2.0.ZU;2-N
Abstract
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-t o-leading order coefficient functions in the singlet sector. To obtain the result, the partonic processes of virtual Compton scattering off two and th ree on-shell gluons are calculated. A key step in achieving the correct fac torization is to separate the correct twist-two contribution. The Burkardt- Cottingham sum rule is nominally satisfied at this order.