Speaker
Description
Recent results of coupled channel partial wave analyses with various $\bar{p}p$-annihilation, $\pi\pi$- and $\pi^-p$-scattering data performed with the powerful and user-friendly PAWIAN (Partial Wave Interactive Analysis) package will be presented. By considering analyticity and unitarity conditions using the K-matrix approach with Chew-Mandelstam functions, pole positions and decay branching fractions for numerous light mesons could be determined. Also a significant contribution of the $\pi_1$-wave has been identified in $\bar{p}p$ in-flight data from Crystal Barrel. In particular the coupling of the amplitudes identified in the $\bar{p}p$ channels with the $\pi_1$- and $a_2$-waves seen in the $\pi^- p$-process measured at COMPASS could provide new insights for a better understanding of this spin exotic $I^G(J^{PC})=1^-(1^{-+})$ wave in the mass region below 2 GeV$/c^2$.
| speaker affiliation | Ruhr-Universität Bochum |
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