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arXiv 1111.1831hep-ph
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反常夸克-胶子色磁相互作用与高能$ρ$ -介子电产生

Anomalous quark-gluon chromomagnetic interaction and high energy $ρ$-meson electroproduction

Nikolai Korchagin, Nikolai Kochelev, Nikolai Nikolaev

摘要:

结果表明,由于QCD的非微扰结构引起的夸克色磁矩的大反常,对质子靶外的$ρ$ -介子电生有额外的贡献.发现了新型夸克-胶子相互作用对虚光子横向和纵向极化的$ρ$ -介子产生截面的显著贡献,这种非微扰贡献与常规微扰双胶子交换作用一起使我们能够描述低$Q^2$横向极化的实验数据.然而,在纵向极化的情况下,仍然有一些与数据的差异。讨论了这种偏差的可能来源。

英文摘要:

It is shown that existence of a large anomalous chromomagnetic moment of quark induced by non-perturbative structure of QCD leads to the additional contribution to exclusive $ρ$-meson electroproduction off proton target. The significant contribution coming from new type of quark-gluon interaction to the $ρ$-meson production cross section for both transversal and longitudinal polarization of virtual photon is found. Such non-perturbative contribution together with conventional perturbative two-gluon exchange allows us to describe the experimental data at low $Q^2$ for transversal polarization. However, in the longitudinal polarization case there is still some discrepancy with the data. The possible source of this deviation is discussed.

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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