Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-04-05
Phys.Rev.D83:114014,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 4 figures. Final version to appear in Phys. Rev. D. Presentation changed slightly
Scientific paper
10.1103/PhysRevD.83.114014
We derive a "master formula" for the contribution of the three-gluon correlation function in the nucleon to the twist-3 single-spin-dependent cross section for semi-inclusive deep-inelastic scattering, ep^\uparrow\to eDX. This is an extension of the similar formula known for the so-called soft-gluon-pole contribution induced by the quark-gluon correlation function in a variety of processes. Our master formula reduces the relevant interfering partonic subprocess with the participation of the three gluons to the Born cross sections for the \gamma^*g\to c\bar{c} scattering, which reveals the new structure behind the twist-3 single spin asymmetry and simplifies the actual calculation greatly. A possible extension to higher order corrections is also discussed.
Koike Yuji
Tanaka Kazuhiro
Yoshida Shinsuke
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