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arXiv 1111.0197hep-phnucl-exnucl-th
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强子-光子和强子-介子散射的Dyson-Schwinger统一描述

Unified description of hadron-photon and hadron-meson scattering in the Dyson-Schwinger approach

Gernot Eichmann, Christian S. Fischer

摘要:

我们从QCD的基本结构出发,导出了强子与两个外流的非微扰耦合的表达式。在微观上,每个电流的作用都被分解为与缀饰夸克的耦合。电流的洛伦兹结构是任意的,因此可以在同一框架内描述强子与光子以及介子的相互作用。我们分析了由此产生的四点函数的成分,并探索其潜力来描述各种相关的实验过程。可能的应用包括康普顿散射、强子形状因子中双光子效应的研究、核子上的π介子光生和电生、核子-π介子或π介子-π介子散射。

英文摘要:

We derive the expression for the nonperturbative coupling of a hadron to two external currents from its underlying structure in QCD. Microscopically, the action of each current is resolved to a coupling with dressed quarks. The Lorentz structure of the currents is arbitrary and thereby allows to describe the hadron's interaction with photons as well as mesons in the same framework. We analyze the ingredients of the resulting four-point functions and explore their potential to describe a variety of processes relevant in experiments. Possible applications include Compton scattering, the study of two-photon effects in hadron form factors, pion photo- and electroproduction on a nucleon, nucleon-pion or pion-pion scattering.

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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