A pionic hadron explains the muon magnetic moment anomaly

A significant discrepancy exists between experiment and calculations of the muon's magnetic moment. We find that standard formulas for the hadronic vacuum polarization term have overlooked pionic states known to exist. Coulomb binding alone guarantees π+π− states that quantum mechanically mix with the ρ meson. A simple 2-state mixing model explains the magnetic moment discrepancy for a mixing angle of order α∼10−2. The relevant physical state is predicted to give a tiny observable bump in the ratio R(s) of e+e− annihilation at a low energy not previously searched. The burden of proof is reversed for claims that conventional physics cannot explain the muon's anomalous moment.