A Search for Axial Vectors in p p→K^± K_miss^0 π^± π^+ π^- Annihilations at Rest in Gaseous Hydrogen at NTP

The study of the K^± K_miss^0 π^± π^+ π^- Channel (7016 events), from p ̅p 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 low KK ̅π mass region, the well established f_1(1285), decaying to a_0(980)π, the second, the 1^++ component of the old puzzling E/i, the f_1(1420), decaying mainly to K^*K ̅, seen for the first time in p ̅p annihilation at rest. The analysis confirms the dominant production of the pseudoscalar η(1405), decaying mainly to (Kπ)_sK ̅, and the existence of a second pseudoscalar in the same mass region, the η(1460), decaying mainly to K*K ̅.