The Nucleon and Roper Resonance in a Chiral Quark Diquark Model
High Energy Physics - Phenomenology
2009-11-11 v1
Abstract
A description of the nucleon and Roper resonance in a quark-diquark approach is presented. We show that two states with the quantum number of the nucleon can appear in the ground state of the spatial configuration, when there are two types of diquarks: scalar-isoscalar and axial-vector-isovector diquarks. The mass difference between the two states is generated by the mass difference between the two diquarks, which is due to the spin-spin interaction between the two quarks in the diquarks. The two states are then identified with the nucleon and Roper resonance.
Cite
@article{arxiv.hep-ph/0512336,
title = {The Nucleon and Roper Resonance in a Chiral Quark Diquark Model},
author = {Keitaro Nagata and Atsushi Hosaka},
journal= {arXiv preprint arXiv:hep-ph/0512336},
year = {2009}
}
Comments
3 pages, 3figures. The proceedings of Particles and Nuclei International Conference: PANIC05, Santa Fe, US, October 24-28, 2005