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arXiv 0707.0262hep-phhep-exnucl-th
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a0-f0混合的研究

Investigation of a0-f0 mixing

Christoph Hanhart, Bastian Kubis, Jose R. Pelaez

摘要:

本文采用么正化手征方法研究了轻标量介子a0(980)和f0(980)的同位旋破坏混合。在夸克质量差和电磁学中,同位旋破坏效应被认为是最重要的。在这种方法中,两个介子都是通过介子-介子动力学产生的。我们的研究结果提供了一个符合手征对称性和么正性的框架内的混合现象的描述,这些共振不占主导地位的q q-巴状态。在可能的实验信号中,我们详细讨论了反应J/Psi -> phi pi 0 eta的可观察到的后果。特别是,我们证明了a0-f0混合的效果是迄今为止最重要的同位旋破坏效应的共振区,确实可以从实验中提取。

英文摘要:

We investigate the isospin-violating mixing of the light scalar mesons a0(980) and f0(980) within the unitarized chiral approach. Isospin-violating effects are considered to leading order in the quark mass differences and electromagnetism. In this approach both mesons are generated through meson-meson dynamics. Our results provide a description of the mixing phenomenon within a framework consistent with chiral symmetry and unitarity, where these resonances are not predominantly q q-bar states. Amongst the possible experimental signals, we discuss observable consequences for the reaction J/Psi -> phi pi0 eta in detail. In particular we demonstrate that the effect of a0-f0 mixing is by far the most important isospin-breaking effect in the resonance region and can indeed be extracted from experiment.

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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