Electromagnetic transition form factors of the Roper resonance in effective field theory

Abstract

We analyze the form factors of the electromagnetic nucleon-to-Roper-resonance transition in the framework of low-energy effective field theory. A systematic power-counting procedure is generated by applying the complex-mass scheme. Within this power counting we calculate the form factors to next-to-next-to-leading order and fit the results to empirical data.

16 pages, 6 figures

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• 50 Years of Quantum Chromodynamics
• New Results from the Studies of the $N(1440)1/2^{+}$, $N(1520)3/2^{-}$, and $\Delta (1620)1/2^{-}$ Resonances in Exclusive $ep\to e^{\prime }{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction with the CLAS Detector
• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• Electromagnetic Transition Form Factors of Baryon Resonances
• Nucleon resonances in Compton scattering
• Nucleon resonances with higher spins in soft-wall AdS/QCD
• Valence quark contributions for the ${\gamma }^{\ast }N\to N(1440)$ form factors from Light-Front holography
• N* Experiments and their Impact on Strong QCD Physics
• Vector form factor of the pion in chiral effective field theory
• Nucleon-to-Delta transition form factors in chiral effective field theory using the complex-mass scheme
• Nucleon Resonance Physics
• Spectrum and Structure of Excited Baryons with CLAS
• The Roper Resonance in a finite volume
• Electromagnetic transition form factors of the Roper resonance in baryon chiral perturbation theory
• Mass and width of the $\Delta (1232)$ resonance using complex-mass renormalization
• Pion photo- and electroproduction and the chiral MAID interface
• Pion Photo- and Electroproduction and the Chiral MAID Interface