Partial wave analysis of the {pi}{sup -}{pi}{sup -}{pi}{sup +} and {pi}{sup -}{pi}{sup 0}{pi}{sup 0} systems and the search for a J{sup PC}=1{sup -+} meson

A partial wave analysis (PWA) of the {pi}{sup -}{pi}{sup -}{pi}{sup +} and {pi}{sup -}{pi}{sup 0}{pi}{sup 0} systems produced in the reaction {pi}{sup -}p{yields}(3{pi}){sup -}p at 18 GeV/c was carried out using an isobar model assumption. This analysis is based on 3.0 M {pi}{sup -}{pi}{sup 0}{pi}{sup 0} events and 2.6 M {pi}{sup -}{pi}{sup -}{pi}{sup +} events and shows production of the a{sub 1}(1260), a{sub 2}(1320), {pi}{sub 2}(1670), and a{sub 4}(2040) resonances. Results of detailed studies of the stability of partial wave fits are presented. An earlier analysis of 250 K {pi}{sup -}{pi}{sup -}{pi}{sup +} events from the same experiment showed possible evidence for a J{sup PC}=1{sup -+} exotic meson with a mass of {approx}1.6 GeV/c{sup 2} decaying into {rho}{pi}. In this analysis of a higher statistics sample of the (3{pi}){sup -} system in two charged modes we find no evidence of an exotic meson.