Observed Property of σ-Meson and Chiral Symmetry(§2. ππ/Kπ Scattering,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)
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概要
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The phenomenologically observed property of σ(600) in our recent analyses of various ππ-scattering and -production processes is reviewed and compared with the prediction of SU(2) linear σ model. Furthermore, a possibility of the scalar σ-nonet (σ(600), κ(900), f_0(980) and a_0(980)) forming with the pseudoscalar π-nonet a linear representation of SU(3) chiral symmetry is investigated. The origin of repulsive background phase shift δ_<BG>, which is essential to lead us to the σ-existence in our phase shift analysis, is shown to come from the repulsive λφ^4 interaction.
- 素粒子論グループ 素粒子研究編集部の論文
- 2001-02-20
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