2016/05/17 by Pedro Bicudo, Marco Cardoso, Felipe J. Llanes-Estrada +2 · 13 citations
Physics and Astronomy · #Baryon #Black Holes and Theoretical Physics #Chiral symmetry breaking #Excited state #Explicit symmetry breaking #Geometry #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Spontaneous symmetry breaking #Symmetry (geometry) #Symmetry breaking #hep-ph
paper · pdf · doi:10.1103/physrevd.94.054006
published in Physical review. D/Physical review. D. 94(5) (American Physical Society) · 22 pages, 16 figures, submitted to Phys. Rev. D
arxiv created 2016/05/17 · openalex publication_date 2016/09/07 · arxiv updated 2016/09/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 I=1/2 and I=3/2 baryons, up to large spin J=13/2, 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.