Evidence for the Existence of TwoY1*(1660)Resonance

Abstract

The production angular distribution of the reaction $K^{-}p\to {Y_1}^{*+}\mathrm{}\left(1660\right)\mathrm{}{\pi }^{-}$ around 2.6 GeV/c, measured by using the ${\left(\Sigma \pi \right)}^{+}$ and ${\left(\Sigma \pi \pi \right)}^{+}$ decay modes, is interpreted as evidence for two distinct ${Y_1}^{*}\mathrm{}\left(1660\right)\mathrm{}$ resonances.