arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.4268hep-ph
收藏

QCD中的对偶与因子分解定理

Duality and Factorization Theorem in QCD

I. V. Anikin, I. O. Cherednikov, N. G. Stefanis, O. V. Teryaev

摘要:

我们发现,在标量$φ^3_E$模型中的“双光子”过程中,以及在QCD中由一个实的(横向偏振的)和一个高度虚的、纵向偏振的光子碰撞产生的强子对中,两种不同的非微扰机制之间存在着对偶性。这两种机制,一个涉及扭转-3广义分布幅度,另一个采用领先扭转过渡分布幅度,与不同的制度的因式分解。在运动学区域,两种机制重叠,观察到的对偶性的标量$φ^3_E$模型,而在QCD的情况下,对偶性的外观原来是敏感的特定的非微扰模型应用,因此,可以作为一种工具,用于选择最合适的。

英文摘要:

We find that in "two-photon"-like processes in the scalar $φ^3_E$ model and also in hadron-pair production arising from the collisions of a real (transversely polarized) and a highly virtual, longitudinally polarized, photon in QCD, there is duality between two distinct nonperturbative mechanisms. These two mechanisms, one involving a twist-3 Generalized Distribution Amplitude, the other employing a leading-twist Transition Distribution Amplitude, are associated with different regimes of factorization. In the kinematical region, where the two mechanisms overlap, duality is observed for the scalar $φ^3_E$ model, while in the QCD case the appearance of duality turns out to be sensitive to the particular nonperturbative model applied and can, therefore, be used as a tool for selecting the most appropriate one.

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。

↑