U_A(1) Breaking Effects on the Light Scalar Meson Spectrum
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概要
- 論文の詳細を見る
Effects of the U_A(1) breaking interaction on the low-lying nonet scalar mesons are studied using the extended Nambu-Jona-Lasinio model. The strength of the U_A(1) breaking interaction is determined by the electromagnetic decays of the η meson. We find that the U_A(1) breaking interaction gives rise to about 150 MeV mass difference between the σ and a_0 mesons. We also find that the strangeness content in the a meson is about 15%. The calculated mass of the I = 1/2 state is about 200 MeV heavier than that of the I = 1 state. The order of these masses is not likely to change within this model.
- 理論物理学刊行会の論文
- 2003-06-25
著者
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岡 真
Department Of Physics Tokyo Institute Of Technology
-
Naito K
Meme Media Laboratory Graduate School Of Engineering Hokkaido University
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Kenichi Naito
Meme Media Laboratory, Graduate School of Engineering, Hokkaido University
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Naito Kenichi
Meme Media Laboratory Graduate School Of Engineering Hokkaido University
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TAKIZAWA Makoto
Showa Pharmaceutical University
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Umekawa Toru
Department Of Physics Tokyo Institute Of Technology
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OKA Makoto
Department of Pharmacology, Research Laboratories, Dainippon Pharmaceutical Co., Ltd.
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