The 1.477 GeV zero in nn e- + e+ → 4 pions in (211) Clegg & Donnachie, Z. Phys. C62, 455 (1994)

Resonances: 1.10 GeV gives rho(770) 1.48 GeV gives rho(1270) and rho(1450) 1.86 GeV gives rho(1650) and rho(1830)