BHLS${}_2$ Upgrade : $\tau$ spectra, muon HVP and the [${\pi }^0,\eta ,{\eta }^{\prime }$] System

Maurice Benayoun, Luigi DelBuono, Friedrich Jegerlehner

The generic Hidden Local Symmetry (HLS) model has given rise to the BHLS${}_2$ variant which introduces symmetry breaking in the vector meson sector; the central mechanism is a modif…