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arXiv 0803.2218hep-ph
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非定域手征夸克模型GPD对偶参数化的类前向函数

Forward-like functions for dual parametrization of GPDs from nonlocal chiral quark model

Kirill M. Semenov-Tian-Shansky

摘要:

我们推导出一组反演关系,允许建立GPD的双参数化和广泛的一类GPD的唯象模型之间的联系。作为一个例子,我们考虑了在非定域手征夸克模型(NlCQM)框架下计算π介子GPD的结果,在对偶参数化框架下恢复了代表该GPD的类前向函数集.我们还认为,阿贝尔层析成像方法忽略了可能的δ函数一样的贡献,GPD的quintessence功能明确的贡献,D从因子。

英文摘要:

We derive the set of inversion relations allowing to establish the link between the dual parametrization of GPDs and a broad class of phenomenological models for GPDs. As an example we consider the results of the calculation of the pion GPD in the framework of nonlocal chiral quark model (NlCQM) to recover the set of forward-like functions representing this GPD in the framework of dual parametrization. We also argue that Abel tomography method overlooks possible delta function like contributions to GPD quintessence function making explicit contribution to the D from factor.

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