Experimental Study of the Axial-Vector Resonances of ${{\mathit a}_{{{1}}}}$ and ${{\mathit h}_{{{1}}}}$ in the ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ Charge Exchange Reaction
DANKOWYCH
1981
PRL 46 580
Evidence for $\mathit I = 1$ (${{\mathit A}_{{{1}}}}$) and $\mathit I = 0$ (${{\mathit H}}$) Axial Vector Resonances in Charge Exchange