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arXiv 1506.01302hep-ph
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π介子和纵向极化$ρ$介子的嵌合体分布振幅

Chimera distribution amplitudes for the pion and the longitudinally polarized $ρ$-meson

N. G. Stefanis, A. V. Pimikov

摘要:

利用非定域凝聚的QCD求和规则,我们证明了纵向极化$ρ$介子的分布振幅可能具有短尾的平峰分布,这与我们最近提出的π介子的平峰分布振幅非常相似.这样的嵌合体分布事实上合并了广泛的单峰分布的振幅,得到了基于戴森-Schwinger方程的计算方案,与抑制尾部特征的双峰分布振幅来自QCD求和规则与非局部凝聚。我们认为,斑图形成,出现在集体同步的耦合振子,可以提供一个单一的理论框架来研究单峰和双峰分布振幅的轻介子没有求助于特定的计算方案和他们的原因。

英文摘要:

Using QCD sum rules with nonlocal condensates, we show that the distribution amplitude of the longitudinally polarized $ρ$-meson may have a shorttailed platykurtic profile in close analogy to our recently proposed platykurtic distribution amplitude for the pion. Such a chimera distribution de facto amalgamates the broad unimodal profile of the distribution amplitude, obtained with a Dyson-Schwinger equations-based computational scheme, with the suppressed tails characterizing the bimodal distribution amplitudes derived from QCD sum rules with nonlocal condensates. We argue that pattern formation, emerging from the collective synchronization of coupled oscillators, can provide a single theoretical scaffolding to study unimodal and bimodal distribution amplitudes of light mesons without recourse to particular computational schemes and the reasons for them.

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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