πN→ηN Scattering in the Veneziano Model
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概要
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The Veneziano amplitude for πN→ηN scattering is constructed including N_α, N_β, N_γ, N_δ and A_2 Regge trajectories. The simplest amplitude is investigated and compared with the experimental data. If the trajectories are suitably fixed and certain conditions for the pole structure are set, the amplitude shows remarkable agreement and consistency with the experimental data over the whole energy region. (i) The shape of high energy πN→ηN differential cross section is reproduced and no dip occurs at α_<A2>=0 (A_2 trajectory chooses Gell-Mann mechanism). (ii) The NNη coupling is predicted to be g^2_<NNη>=0.85. (iii) The J^P= (1/2)^- pole near 1530 MeV has large Nπ-Nη coupling corresponding to the predominantly large Nη coupling of S_<11> (1550). (iv) Adler's self-consistency condition is approximately satisfied. (v) The I=1, J^<PC>=0^<++> meson appears near 850 MeV corresponding to the πv(980) meson.
- 理論物理学刊行会の論文
- 1969-08-25
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