# Regge phenomenology of the ${N}^{*}$ and ${\Delta }^{*}$ poles

Silva-Castro, J. A. (Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico) ; Fernández-Ramírez, C. (Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico) ; Albaladejo, M. (Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA) (Departamento de Física, Universidad de Murcia, E-30071 Murcia, Spain) ; Danilkin, I. V. (Institut für Kernphysik & PRISMA Cluster of Excellence, Johannes Gutenberg Universität, D-55099 Mainz, Germany) ; Jackura, A. (Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47403, USA) (Physics Department, Indiana University, Bloomington, Indiana 47405, USA) ; Mathieu, V. (Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA) ; Nys, J. (Department of Physics and Astronomy, Ghent University, Ghent 9000, Belgium) ; Pilloni, A. (Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA) (European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) and Fondazione Bruno Kessler, I-38123 Villazzano (TN), Italy) ; Szczepaniak, A. P. (Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA) (Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47403, USA) (Physics Department, Indiana University, Bloomington, Indiana 47405, USA) ; Fox, G. (School of Informatics and Computing, Indiana University, Bloomington, Indiana 47405, USA)

14 February 2019

Abstract: We use Regge phenomenology to study the structure of the poles of the ${N}^{*}$ and ${\Delta }^{*}$ spectrum. We employ the available pole extractions from partial wave analysis of meson scattering and photoproduction data. We assess the importance of the imaginary part of the poles (widths) to obtain a consistent determination of the parameters of the Regge trajectory. We compare the several pole extractions and show how Regge phenomenology can be used to gain insight into the internal structure of baryons. We find that the majority of the states in the parent Regge trajectories are compatible with a mostly compact three-quark state picture.

Published in: Physical Review D 99 (2019)