Coupled channel analysis of π + π − π 0 , K + K − π 0 and K ± K 0 Sπ ∓ from p̄p annihilation at rest in hydrogen targets at three densities The OBELIX Collaboration

The π+π−π0, K+K−π0 and K±K0π∓ final states produced by p̄p annihilation at rest at three different hydrogen target densities have been analyzed in the frame of a coupled channel analysis together with ππ, πK and KK̄ scattering data. The percentages of the different partial waves, the branching ratios and the parameters (masses, widths, ππ and KK̄ partial widths) of all the involved resonances (J = 0, 1−, 2) have been measured. The main results on meson spectroscopy concern the determination of the ΓKK̄/Γππ ratio for f0(1370) and f0(1500) (ΓKK̄/Γππ = 0.91 ± 0.20 and ΓKK̄/Γππ = 0.25 ± 0.03 respectively), the determination of a0(1300) parameters (M = 1303 ± 16MeV; Γ = 92 ± 16MeV) and the observation of two different ρ signals associated to ρ(1450) and ρ(1700) (M = 1182 ± 30MeV;Γ = 389± 20MeV and M = 1594± 20MeV;Γ = 259± 20MeV respectively).