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arXiv 0711.3076hep-ph
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强子分子的辐射衰变

Radiative decays of hadronic molecules

A. V. Nefediev

摘要:

有人认为,标量a0/f0(980)的辐射衰变可以作为一个决定性的工具,在建立后者的性质。特别地,在标量的分子模型的框架中给出了辐射衰变S-> γ V(S=a0/f0(980),V=omega/rho/gamma)的宽度的预测。本文详细讨论了强子分子两γ衰变的短程修正,特别注意了问题中涉及的各种尺度的相互作用和振幅的规范不变性。结果被应用到双光子衰变的f0(980),和现有的实验数据,这种衰变被认为是支持的标量f0(980)的分子分配。

英文摘要:

It is argued that radiative decays of scalars a0/f0(980) can serve as a decisive tool in establishing the nature of the latter. In particular, predictions for the widths of the radiative decays S->gamma V (S=a0/f0(980), V=omega/rho/gamma) are given in the framework of the molecule model of the scalars. Finite-range corrections are discussed in detail for the two-gamma decays of hadronic molecules, with a special attention payed to the interplay of various scales involved in the problem and to the gauge invariance of the amplitude. The results are applied to the two-photon decay of the f0(980), and the existing experimental data on this decay are argued to support the molecule assignment for the scalar f0(980).

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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