Study of theπρSystem in the Reactionπ−+p→π−+ρ0+pat 8 GeV/c

Abstract

In the reaction ${\pi }^{-}+p\to {\pi }^{-}+{\rho }^0+p$ at 8 GeV/c, we find that the $A_1$ can be explained as a kinematic effect due to a Deck-type mechanism, but only if both $\pi$ and $\rho$ exchanges are included. We also present evidence for a possible ${\pi }^{-}{\rho }^0$ resonance at 1190 MeV with a width of 17 MeV.