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Electromagnetic mass and coupling-constant shifts ofN and Δ (1238) in a bootstrap model

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Czechoslovak Journal of Physics B Aims and scope

Abstract

The off-shell reciprocal bootstrap model developed by Biswas and Balázs is used to calculate the mass and coupling-constant shifts of the nucleon andΔ-resonance in a self-consistent way. It is shown that the electromagnetic corrections to theΔNΠ coupling constant play a crucial role for obtaining the correct sign of the nucleon mass difference. The effects of mass splittings of exchanged and external particles are also included. The one-photon exchange contributions to the splittings of coupling constants and masses are calculated by means of the Frautschi-Dashen perturbation method. The result of the present calculation Mp−Mn= −1·8 MeV is in rough agreement with the experimental value −1·3 MeV.

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Authors and Affiliations

  1. Slovak Technical University, Bratislava, Gottwaldovo 50, Bratislava, Czechoslovakia

    P. Lichard

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  1. P. Lichard
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This work was done in part under Contract No. SjF 68/16.

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Lichard, P. Electromagnetic mass and coupling-constant shifts ofN and Δ (1238) in a bootstrap model. Czech J Phys 19, 730–747 (1969). https://doi.org/10.1007/BF01697129

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  • DOI: https://doi.org/10.1007/BF01697129

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