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

WU Feng-Quan; ZHANG Yin-Jie; ZOU Bing-Song

doi:10.1088/1674-1137/32/8/008

Chinese Physics C> 2008, Vol. 32> Issue(8) : 629-633 DOI: 10.1088/1674-1137/32/8/008

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

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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.

References

[1]

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: ZOU Bing-Song,

Received Date: 2007-11-05

Accepted Date: 2008-01-23

Available Online: 2008-08-05

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

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