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Electromagnetic transition form factors of the Roper resonance in baryon chiral perturbation theory

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Abstract.

We consider the electromagnetic transition form factors of the Roper resonance in the framework of an effective field theory of pions, nucleons and delta and Roper resonances as explicit degrees of freedom. We fit two free parameters to experimental data for the N(1440) photon decay helicity amplitudes \( A_{1/2}\) taken from PDG and make predictions for the \( Q^2\) dependence of these amplitudes. We also estimate the contributions of the delta resonances.

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Authors and Affiliations

  1. Center for Elementary Particle Physics, ITP, Ilia State University, 0162, Tbilisi, Georgia

    M. Gelenava

  2. Helmholtz Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany

    M. Gelenava

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  1. M. Gelenava
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Correspondence to M. Gelenava.

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Communicated by S. Hands

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Gelenava, M. Electromagnetic transition form factors of the Roper resonance in baryon chiral perturbation theory. Eur. Phys. J. A 54, 88 (2018). https://doi.org/10.1140/epja/i2018-12523-5

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  • DOI: https://doi.org/10.1140/epja/i2018-12523-5

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