The corresponding isospin zero particle is the omega meson.
In holographic models it is a Kaluza-Klein mode of the vector SU(2) symmetry, which refines the older idea of hidden local symmetry. A precise measurement of the spectral function on this resonance could improve one of the largest uncertainties in the theoretical calculation of muon g minus 2, namely the hadronic vacuum polarization. It is a triplet under isospin; the neutral component of the triplet mixes with the photon, and thus has rare decays to electron pairs. The corresponding isospin zero particle is the omega meson. The tau lepton frequently decays to one of these plus a neutrino. FTP, what is this lightest spin-1 particle in QCD, which decays to two pions?
In holographic models it is a Kaluza-Klein mode of the vector SU(2) symmetry, which refines the older idea of hidden local symmetry.
rho meson