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Role of t-channel meson exchanges in S-wave πN and KN scatterings
The low-energy S-wave πN and KN scatterings are studied by using the K-matrix approach within the meson exchange framework.The t-channel meson exchanges,especially ρ and σ exchanges,are found to play a very important role in these two processes.The t-channel ρ exchange determines the isospin structure of the scattering amplitudes,it gives attractive force in the low isospin state but repulsive force in the high isospin state.The t-channel σ exchange gives a very large contribution in these two processes,while it is negligible in meson-meson S-wave scatterings.
作 者： WU Feng-Quan ZHANG Yin-Jie ZOU Bing-Song 作者单位： WU Feng-Quan(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China)ZHANG Yin-Jie(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;College of Physics Science and Technology,Hebei University,Baoding 071002,China)
ZOU Bing-Song(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Theoretical Physics Center for Science Facilities,CAS,Beijing 100049,China)
刊 名： 中国物理C(英文版) ISTIC 英文刊名： CHINESE PHYSICS C 年，卷(期)： 2008 32(8) 分类号： O4 关键词： meson exchange K-matrix πK KN【Role of t-channel meson exchanges in】相关文章：
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