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arXiv 0804.3450hep-ph
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标量介子(Scalar Mesons)

Review of Scalar Mesons

D. V. Bugg

摘要:

对sigma、kappa、a0(980)和f0(980)参数化所需的公式进行了评述。对于sigma和kappa,由于手征对称性破缺导致的Adler零点起着至关重要的作用。f0(980)和a0(980)通过尖点机制锁定到KK阈值,尖点机制导致阈值处的吸引力的尖峰。这一机制可以发挥更广泛的作用。一个新的建议是,禁闭势涉及QCD效应(色夸克和胶子)和传统介子交换之间的合作效应。

英文摘要:

The formulae needed to parametrise sigma, kappa, a0(980) and f0(980) are reviewed. For sigma and kappa, the Adler zero due to Chiral Symmetry Breaking plays a crucial role. The f0(980) and a0(980) are locked to the KK threshold by a cusp mechanism which leads to a sharp peak in attraction at the threshold. This mechanism may play a wider role. A novel suggestion is that the confinement potential involves a cooperative effect between QCD effects (coloured quarks and gluons) and conventional meson exchanges.

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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