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Prog. Theor. Phys. Vol. 22 No. 3 (1959) pp. 321-334

The Pion-Nucleon S-Wave Scattering, the Structure of the Nucleon and the Composite Model of Baryons and Mesons

Yasusi Ataka

Department of Physics, Kinki University, Osaka

(Received April 16, 1959)

Abstract:

It seems impossible that the pion-nucleon s-wave scattering can be explained in the frame of meson theory. It is suggested from the experimental result that the static pion-nucleon potential with the appropriate isospin dependence has the possibility of explaining this phenomenon. The following characteristics of Fermi-Yang's composite model of pions are noticed: (i) Pions are bound states of one nucleon and one antinucleon. (ii) The attractive short range static potential exists between nucleon and antinucleon, and the repulsive short range static potential between nucleon and nucleon. (iii) The numbers of nucleons and antinucleons are independently conserved.
Using this model, we obtain the static potential between a pion and a nucleon. When the interaction type is vector, the static pion-nucleon potential with the charge dependence τ · ω is given. In this case, the pion-nucleon force in the state I = ½ becomes attractive, therefore the bound states of two nucleons and one antinucleon may be possible. We consider this bound state of total isospin one half and spin one half as the nucleon core. Then the possibility of understanding the extension and other mysterious properties of the nucleon core exists.
This model is extended to every baryon and meson.

URL : http://ptp.ipap.jp/link?PTP/22/321/
DOI : 10.1143/PTP.22.321

[ Full Text PDF : FREE ACCESS (794K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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Citing Article(s) :

1. Progress of Theoretical Physics Vol. 22 No. 5 (1959) pp. 725-735 :

   Coupling Constants in β-Decay and Nucleon Structure

   Masami Nakagawa

2. Progress of Theoretical Physics Vol. 24 No. 1 (1960) pp. 211-213 :

   On the G_A/G_V Ratio in β-Decay

   Chiaki Ihara

3. Progress of Theoretical Physics Vol. 24 No. 1 (1960) pp. 218-220 :

   Some Remarks on Fermi-Yang Model

   Yasusi Ataka

4. Progress of Theoretical Physics Vol. 25 No. 1 (1961) pp. 156-158 :

   Note on the Pion Propagator in the Composite Theory

   Takeshi Kanki

5. Progress of Theoretical Physics Vol. 25 No. 6 (1961) pp. 895-900 :

   The Composite Model of Mesons as a Limit of Meson Theory

   Yasusi Ataka

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