Electromagnetic transition form factors of the Roper resonance in effective field theory
arXiv:1402.0741 · doi:10.1103/PhysRevC.90.015201
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