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Pion electro-production in the Roper region: K-matrix approach
Authors: B. Golli, S. Sirca, M. Fiolhais
Ref.: Bled Workshops in Physics 10, No. 1, 71-76 (2009)
Abstract: We review a method to calculate the pion electro-production amplitude in a framework of a coupled channel formalismincorporating quasi-bound quark-model states and discuss the results for the M1− and the S1− amplitudes in the P11 partial wave obtained in the Cloudy Bag Model.