Role of t-channel meson exchanges in S-wave πN and KN scatterings

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WU Feng-Quan, ZHANG Yin-Jie and ZOU Bing-Song. Role of t-channel meson exchanges in S-wave πN and KN scatterings[J]. Chinese Physics C, 2008, 32(8): 629-633. doi: 10.1088/1674-1137/32/8/008
WU Feng-Quan, ZHANG Yin-Jie and ZOU Bing-Song. Role of t-channel meson exchanges in S-wave πN and KN scatterings[J]. Chinese Physics C, 2008, 32(8): 629-633.  doi: 10.1088/1674-1137/32/8/008 shu
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Received: 2007-11-05
Revised: 2008-01-23
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Role of t-channel meson exchanges in S-wave πN and KN scatterings

    Corresponding author: ZOU Bing-Song,

Abstract: 

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.

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