Journal
PHYSICAL REVIEW D
Volume 83, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.114014
Keywords
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Funding
- Japan Society of Promotion of Science [22.6032]
- [22011012]
- Grants-in-Aid for Scientific Research [10J06032] Funding Source: KAKEN
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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(up arrow) -> 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 -> c (c) over bar 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.
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