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首页> 外文期刊>Physics of atomic nuclei >2 gamma decays of scalar mesons (sigma(600), f (0)(980), and a (0)(980)) in the Nambu-Jona-Lasinio model
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2 gamma decays of scalar mesons (sigma(600), f (0)(980), and a (0)(980)) in the Nambu-Jona-Lasinio model

机译:Nambu-Jona-Lasinio模型中标量介子的2个伽马衰变(sigma(600),f(0)(980)和a(0)(980))

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摘要

The two-photon decay widths of scalar mesons sigma(600), f (0)(980), and a (0)(980) are calculated in the framework of the local Nambu-Jona-Lasinio model. The contributions of the quark loops (Hartree-Fock approximation) and the meson loops (next 1/N (c) approximation, where N (c) is the number of colors) are taken into account. These contributions, as we show, are the values of the same order of magnitude. For the f (0) decay the K-loop contribution turns out to play the dominant role. The results are in satisfactory agreement with modern experimental data.
机译:标量介子sigma(600),f(0)(980)和a(0)(980)的双光子衰变宽度是在局部Nambu-Jona-Lasinio模型的框架中计算的。考虑了夸克循环(Hartree-Fock近似)和介子循环(next 1 / N(c)近似,其中N(c)是颜色数)的贡献。如我们所示,这些贡献是相同数量级的值。对于f(0)衰减,K环贡献起主要作用。结果与现代实验数据令人满意。

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