Mapping chiral symmetry breaking in the excited baryon spectrum
Abstract
We study the conjectured "Insensitivity to Chiral Symmetry Breaking" in the highly excited light baryon spectrum. While the experimental spectrum is being measured at JLab and CBELSA/TAPS, this insensitivity remains to be computed theoretically in detail. As the only existing option to have both confinement, highly excited states and chiral symmetry, we adopt the truncated Coulomb gauge formulation of QCD, considering a linearly confining Coulomb term. Adopting a systematic and numerically intensive variational treatment up to 12 harmonic oscillator shells we are able to access several angular and radial excitations. We compute both the excited spectra of and baryons, up to large spin , and study in detail the proposed chiral multiplets. While the static-light and light-light spectra clearly show chiral symmetry restoration high in the spectrum, the realization of chiral symmetry is more complicated in the baryon spectrum than earlier expected.
Keywords
Cite
@article{arxiv.1605.05171,
title = {Mapping chiral symmetry breaking in the excited baryon spectrum},
author = {Pedro Bicudo and Marco Cardoso and Felipe J. Llanes-Estrada and Tim Van Cauteren},
journal= {arXiv preprint arXiv:1605.05171},
year = {2016}
}
Comments
22 pages, 16 figures, submitted to Phys. Rev. D