We calculate the form factors of the electromagnetic nucleon-to-Δ-resonance transition to third chiral order in manifestly Lorentz-invariant chiral effective field theory. For the purpose of generating a systematic power counting, the complex-mass scheme is applied in combination with the small-scale expansion. We fit the results to available empirical data.
@article{arxiv.1712.08904,
title = {Nucleon-to-Delta transition form factors in chiral effective field theory using the complex-mass scheme},
author = {M. Hilt and T. Bauer and S. Scherer and L. Tiator},
journal= {arXiv preprint arXiv:1712.08904},
year = {2018}
}