Chiral quark model with relativistic kinematics

Details Chiral quark model with relativistic kinematics Chiral quark model with relativistic kinematics

2003-08-04

arxiv.org/abs/hep-ph/0308023v1

Phys.Rev. C68 (2003) 035207

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures. To appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.68.035207

The non-strange baryon spectrum is studied within a three-body model that incorporates relativistic kinematics. We found that the combined effect of relativistic kinematics together with the pion exchange between quarks is able to reverse the order of the first positive- and negative-parity nucleon excited states as observed experimentally. Including the chiral partner of the pion (the $\sigma$ meson) leads to an overall good description of the spectrum.

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