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arXiv 2008.01744hep-phhep-th
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超前功率以外的横向动量相关分布的计算

Calculation of transverse momentum dependent distributions beyond the leading power

Valentin Moos, Alexey Vladimirov

摘要:

计算了扭转2和扭转3部分子分布函数对$b$各次幂的横动量相关分布的小$b$展开的贡献.计算是通过扭转分解方法的旋量形式主义的基础上的所有八个夸克TMD分布。新计算的项伴随着前因子$(M^2b^2)^n$,并表示对图解横截面的靶质量校正。第一次,pretzelosity分布的非平凡表达式推导。

英文摘要:

We compute the contribution of twist-2 and twist-3 parton distribution functions to the small-$b$ expansion for transverse momentum dependent (TMD) distributions at all powers of $b$. The computation is done by the twist-decomposition method based on the spinor formalism for all eight quark TMD distributions. The newly computed terms are accompanied by the prefactor $(M^2b^2)^n$ and represent the target-mass corrections to the resummed cross-section. For the first time, a non-trivial expression for the pretzelosity distribution is derived.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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