Abstract
We analyze the form factors of the electromagnetic nucleon-to-Roper-resonance transition in the framework of a low-energy phenomenological 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.
- Received 4 February 2014
- Revised 13 June 2014
DOI:https://doi.org/10.1103/PhysRevC.90.015201
©2014 American Physical Society