Master Formula for the Three-Gluon Contribution to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
Master Formula for the Three-Gluon Contribution to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
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DOI：
10.1103/physrevd.83.114014
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发表时间：
2011-04
影响因子：
5
通讯作者：
Y. Koike;Kazuhiro Tanaka;Shinsuke Yoshida Niigata Univ.;Juntendo Univ.
中科院分区：
文献类型：
--
作者：
Y. Koike;Kazuhiro Tanaka;Shinsuke Yoshida Niigata Univ.;Juntendo Univ.
我们导出了核子中的三胶子关联函数对半包含深度非弹性散射的扭转-3单自旋相关截面的贡献的“主公式”。这是由夸克-胶子关联函数在各种过程中引起的所谓软胶子极贡献的类似公式的推广。我们的主公式减少了三个胶子参与到玻恩截面的干涉子过程，从而揭示了扭曲3单自旋不对称性背后的新结构，大大简化了实际计算。文中还讨论了对高阶修正的可能推广。
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.