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Prog. Theor. Phys. Vol. 23 No. 2 (1960) pp. 328-352

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On the Electromagnetic Structure of Nucleons and Their Mass Difference

Yasuhisa Katayama, Mituo Taketani, Silvestre Ragusa and Diogenes Rodrigues de Oliveira

Instituto de Física Teórica, São Paulo, Brasil

(Received October 14, 1959)

Abstract:

A semi-phenomenological methodology is proposed for the study of the structures of elementary particles, based on the problem of the electromagnetic structure of nucleon. It is convenient to separate the analyses of structure into two parts. One is the analysis of the outer structure which is characterized as the quasi short distance and defined by r∼0.5y. Though the present field theory could be applied in this region, it is shown that the shape independent feature also holds in so far as the present experimental information is concerned. The other is the presumption of the inner structure of the extreme short distance. We can extract a physical quantity which is effective in the analysis of this region by using a proposed trail model in harmony with the present experiments.
A presumption comes from the electromagnetic mass difference of nucleons. The analyses are devoted to three effects: i) effect of the change of the form factors at the extreme short distance, ii) effect of the neutron charge form factor, and iii) effect of the higher order corrections of the strong interactions. These effects have qualitatively good points for the explanation of the mass-difference. A small modification of the inner structure is especially quantitatively suitable to the experimental value.
Discussions are also devoted to problems of the theory of structure in the future.


URL : http://ptp.ipap.jp/link?PTP/23/328/
DOI : 10.1143/PTP.23.328

[ Full Text PDF : FREE ACCESS (2090K) ] Citation:

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  4. Progress of Theoretical Physics Vol. 23 No. 6 (1960) pp. 1189-1203 :
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  5. Progress of Theoretical Physics Vol. 24 No. 1 (1960) pp. 135-148 :
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  6. Progress of Theoretical Physics Vol. 25 No. 2 (1961) pp. 189-200 :
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  7. Progress of Theoretical Physics Vol. 27 No. 2 (1962) pp. 273-282 :
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  8. Progress of Theoretical Physics Vol. 31 No. 5 (1964) pp. 825-839 :
    Electromagnetic Structure of the Nucleon and Vector Mesons
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