Eur. Phys. J. A (2006) 29: 235-244
https://doi.org/10.1140/epja/i2006-10081-1

Hadron Physics

Spectral patterns in the nonstrange-baryon spectrum

¹ Departamento de Fısica Teórica and IFIC, Universidad de Valencia - CSIC, E-46100, Burjassot, Valencia, Spain
² Grupo de Fısica Nuclear and IUFFyM, Universidad de Salamanca, E-37008, Salamanca, Spain
³ Escuela Superior de Fısica y Matemáticas, Instituto Politécnico Nacional, Edificio 9, 07738, México D.F., Mexico

^* e-mail: valcarce@usal.es

Received: 13 June 2006
Accepted: 7 August 2006
Published online: 8 September 2006

Abstract

We extract, from a quark model potential that reproduces the number and ordering of nonstrange baryonic resonances up to 2.3GeV, the quantum numbers for the dominant configurations in the ground and first nonradial excited states. From the pattern of quantum numbers we identify, from data, spectral regularities that allow us to predict the expected high-spin low-lying spectrum from 2.3 to 3.0GeV. N - Δ degeneracies and N parity doublets showing up can be interpreted in terms of a simple dynamics.