Light scalars, analytical ¦Ð¦Ð scattering amplitude, the Roy equations, and chiral expansion

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• 作者：N.N. Achasov ; A.V. Kiselev
• 关键词：light scalar mesons ; four-quark states ; chiral shielding ; ? radiative decay mechanisms
• 刊名：Nuclear Physics B - Proceedings Supplements
• 出版年：2012
• 出版时间：April-June, 2012
• 年：2012
• 卷：225-227
• 期：Complete
• 页码：14-17
• 全文大小：156 K

文摘

We build up the ¦Ð¦Ð scattering amplitude with regular analytical properties in the s complex plane. This amplitude is used to describe simultaneously the data on the ¦Ð¦Ð scattering, the decay, and the reaction. The chiral shielding of the ¦Ò(600) meson and its mixing with the meson are also taken into account. The amplitude in the range also agrees with results, obtained on the base of the chiral expansion, the dispersion relations, and the Roy equations. The analysis agrees with the four-quark nature of the ¦Ò(600) and mesons.