Dynamical $\mathbf{O}(4)$-Symmetry in the Light Meson Spectrum within the Framework of the Regge Approach

Sergey Afonin, Alisa Tsymbal

The light mesons tend to cluster near certain values of mass. As was noticed almost twenty years ago, the emergent degeneracy is of the same type as the dynamical $O(4)$-symmetry o…