Theoretical Update of Twist-3 Single-Spin Asymmetry in Semi-Inclusive DIS
Theoretical Update of Twist-3 Single-Spin Asymmetry in Semi-Inclusive DIS
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半包容 DIS 中 Twist-3 单自旋不对称性的理论更新
DOI：
10.3360/dis.2009.209
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Juntendo Univ.
中科院分区：
文献类型：
--
作者：
Y. Koike;Kazuhiro Tanaka Hiroshima Univ.;Juntendo Univ.
基于与大横动量π介子产生相关的共线因子分解中的twist-3机制，我们讨论了半包容DIS中的单自旋不对称性，$e p^\uparrow \to e \pi X$.这更新了我们以前的研究，包括，特别是，由新的部分子过程引起的贡献，并允许我们推导出整个公式的相应的单自旋不对称性与一套完整的扭曲3夸克胶子相关函数的横向极化核子。我们讨论了与低横动量π介子产生的横动量相关因子分解结果的对应关系。
We discuss the single-spin asymmetry in semi-inclusive DIS, $e p^\uparrow \to e \pi X$, based on the twist-3 mechanism in the collinear factorization relevant for the pion production with the large transverse-momentum. This updates our previous study by including, in particular, the contributions induced by the novel partonic subprocesses, and allows us to derive the entire formula for the corresponding single-spin asymmetry associated with a complete set of the twist-3 quark-gluon correlation functions in the transversely polarized nucleon. We discuss the correspondence with the results obtained by the transverse-momentum-dependent factorization relevant for the pion production with the low transverse-momentum.