p bar p annihilation at rest into K(L) K+ pi-+

We present a measurement and partial wave analysis of the final state KLK±π∓ of p¯p annihilation at rest in liquid hydrogen. This reaction is important for the study of the K¯K decay mode of scalar resonances, in particular, the isovectors a0(980) and a0(1450). The determination of the a0(1450) production also fixes the K¯K coupling of the isoscalar f0(1500) which is discussed as a glueball. We find B(p¯p→a0(1450)π;a0(1450)→K¯K)=(8.88±1.68)×10−4 and hence B(p¯p→f0(1500)π;f0(1500)→K¯K)=(4.52±0.36)×10−4. The mass and width of a0(1450) are m=1480±30MeV/c2 and Γ=265±15MeV/c2, respectively. For a0(980) we determine the relative ratio B(p¯p→a0π;a0→K¯K)/B(p¯p→a0π;a0→πη) =0.23±0.05 and its relative coupling, K¯K to πη, is 1.03±0.14.