Description symétrique du nucléon et de la résonance de Roper en théorie des champs

Translated title of the contribution: Simmyetrichnoye opisaniye nuklona i ryezonansa Ropyera v tyeorii polya

J. C. Houard, F. Hayot

Research output: Contribution to journalArticlepeer-review


We construct a model of a field theory in which the nucleon and the Roper resonance appear symmetrically, with the three couplings NNπ, NN*π and N*N*π. Starting from the lagrangian we establish the compositeness conditions for the system. The model is used to calculate the I=1/2, J=1/2+ πN amplitude and we show that the results obtained for the real phase shift are in resonable agreement with the phase-shift analyses. We conclude that the Roper resonance may be considered as composite. In this case, however, the pion-nucleon interaction Lagrangian contains an infinite number of coupling terms.

Translated title of the contributionSimmyetrichnoye opisaniye nuklona i ryezonansa Ropyera v tyeorii polya
Original languageFrench
Pages (from-to)496-514
Number of pages19
JournalLa Rivista del Nuovo Cimento
Issue number2
StatePublished - Jan 1968
Externally publishedYes


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