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arXiv 1307.4497hep-phhep-exnucl-th
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自旋为1/2的夸克胶子广义关联函数的结构分析

Structure analysis of the generalized correlator of quark and gluon for a spin-1/2 target

C. Lorcé, B. Pasquini

摘要:

本文分析了自旋为1/2的强子的广义非对角和横动量相关的夸克-夸克和胶子-胶子算符的结构。使用光阵面的形式主义,我们提供了一个参数化的部分广义横向动量依赖的分布,强调多极结构的关联函数。夸克-夸克关联函数的结果与洛伦兹协变结构中给出的另一种参数化是一致的。胶子-胶子广义关联函数的参数化首次提出,并允许一个引入新的关联函数,可以相关的唯象应用。

英文摘要:

We analyze the structure of generalized off-diagonal and transverse-momentum dependent quark-quark and gluon-gluon correlators for a spin-1/2 hadron. Using the light-front formalism, we provide a parametrization in terms of the parton generalized transverse-momentum dependent distributions that emphasizes the multipole structure of the correlator. The results for the quark-quark correlation functions are consistent with an alternative parametrization given in terms of Lorentz covariant structures. The parametrization for the gluon-gluon generalized correlator is presented for the first time and allows one to introduce new correlation functions which can be relevant for phenomenological applications.

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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