Comments on Baryon Transition Form Factors
Nuclear Theory
2026-01-15 v1 High Energy Physics - Experiment
High Energy Physics - Phenomenology
Nuclear Experiment
Abstract
We discuss in rather general terms the properties of space-like baryon transition form factors. In particular, we argue why these are necessarily complex-valued, what can be deduced from the respective phase motion and why dealing with real valued transition form factors in general leads to misleading results. For illustration the transition form factors for the Roper resonance as derived in the J\"ulich-Bonn-Washington framework are discussed.
Keywords
Cite
@article{arxiv.2601.09307,
title = {Comments on Baryon Transition Form Factors},
author = {Christoph Hanhart and Maxim Mai and Ulf-G. Meißner and Deborah Rönchen},
journal= {arXiv preprint arXiv:2601.09307},
year = {2026}
}
Comments
Prepared for the occasion of David Roper's 90$^{\rm th}$ birthday