2007/09/30 by S. S. Afonin, S. S. AFONIN · 31 citations
Physics and Astronomy · #Chiral symmetry breaking #Degeneracy (biology) #Excited state #Meson #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Spectrum (functional analysis) #Symmetry (geometry) #Symmetry group #hep-ph
paper · pdf · doi:10.1142/s0217751x0804175x
published in International Journal of Modern Physics A 23(25), 4205-4217 (World Scientific) · Extended version; to appear in Int. J. Mod. Phys. A
arxiv created 2008/09/09 · openalex publication_date 2008/10/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The recent experimental results on the spectrum of highly excited light nonstrange mesons are known to reveal a high degree of degeneracy among different groups of states. We revise some suggestions about the nature of the phenomenon and put the relevant ideas into the final shape. The full group of approximate mass degeneracies is argued to be SU (2) f × I × O(4), where I is the degeneracy of isosinglets and isotriplets and O(4) is the degeneracy group of the relativistic hydrogen atom. We discuss the dynamical origin and consequences of considered symmetry with a special emphasis on distinctions of this symmetry from the so-called chiral symmetry restoration scenario.