A search for axial vectors in anti-p p --> K+- K0(miss) pi+- pi+ pi- annihilations at rest in gaseous hydrogen at NTP

The study of the K±Kmiss0π∓π+π− channel (7016 events), from p-pbar annihilations in a gaseous hydrogen target at NTP, with the OBELIX spectrometer at LEAR (CERN), is presented. A spin-parity analysis provides evidence for two axial vectors, one in the low K-Kbar-pi mass region, the well established f1(1285), decaying to a0(980)π, the second, the 1++ component of the old puzzling E/iota, the f1(1420), decaying mainly to K*-Kbar, seen for the first time in pbar-p annihilation at rest. The analysis confirms the dominant production of the pseudoscalar η(1405), decaying mainly to (K-pi)S-Kbar, and the existence of a second pseudoscalar in the same mass region, the η(1460), decaying mainly to K*-Kbar.