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Prog. Theor. Phys. Vol. 24 No. 3 (1960) pp. 529-554

[ Full Text PDF : FREE ACCESS (1476K) ]

The Theory of the Nucleon Level Structure in Terms of the Pion-Pion Resonance. I

Kiyomi Itabashi, Masaaki Kato, Kimiko Nakagawa and Gyo Takeda

Institute for Nuclear Study, Tokyo University, Tokyo

(Received April 5, 1960)

Abstract:

The existence of a sharp pion-pion resonance is assumed for the T=j=1 state at about 600 Mev. This resonance state is approximately replaced by a real T=j=1 particle ρ±, 0 and its interactions with the pion field and the electro-magnetic field are determined. The calculation of pion-nucleon scatterings through ρN intermediate states shows in the Born approximation that very strong attractive forces seem to exist for both T=1/2, d3/2 and T=1/2, f5/2 pion-nucleon states at about the ρ-production threshold energy. The former is identified as the second and the latter as the third resonance ovserved in the pion-nucleon scatterings. A similar calculation predicts the possible appearance of the second resonance and the suppression of the third one in the photo-pion productions. A tentative model for explaining the fourth maximum observed in the pion-nucleon scattering is proposed along the similar line.


URL : http://ptp.ipap.jp/link?PTP/24/529/
DOI : 10.1143/PTP.24.529

[ Full Text PDF : FREE ACCESS (1476K) ] Citation:

References:

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