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arXiv 0705.4383hep-ph
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关于介子-重子手征模型中η \to π^0 γγ衰变宽度的一个问题

To a question on the η\to π^0 γγdecay width in meson-baryon chiral model

E. A. Kuraev, V. N. Pervushin, M. K. Volkov

摘要:

它表明在工作的作者之一,在1979年(MKV),贡献的幅度,这种衰变的图表与一个重子回路等于零和贡献的图表与介子回路出现非常小。然而,没有考虑中间矢量介子的极图。在这里,它表明,这些极图的贡献占主导地位。本文所用的介子-重子手征模型与已知的夸克手征模型作了比较。所得到的结果与最近的实验数据是令人满意的协议。

英文摘要:

It is shown in the work of one of the authors in 1979 (MKV) that the contribution to the amplitude of this decay from diagrams with one baryon loop is equal to zero and contributions from diagrams with meson loops appear very small. However, pole diagrams with intermediate vector mesons were not considered there. Here it is shown that contributions of these pole diagrams dominate. The meson-baryon chiral model used here is compared with known quark chiral models. The obtained results are in satisfactory agreement with recent experimental data.

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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