Study of Nonstrange Mesons Produced inK−pInteractions at 3.9 and 4.6 GeV/c
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Abstract
An investigation is presented on the production and decay properties of pseudoscalar, vector, and tensor mesons produced in association with $\ensuremath{\Lambda}$, ${\ensuremath{\Sigma}}^{0}$, and ${Y}^{*}(1385)$ from ${K}^{\ensuremath{-}}p$ interactions at 3.9 and 4.6 GeV/c. The data have been compared with SU(3) and quark-model predictions. New measurements of the mass, width, and branching ratios of the $\ensuremath{\varphi}(1019)$, ${f}^{\ensuremath{'}}(1519)$, and ${Y}^{*}(1385)$ resonances are given. Our analysis of the ${\ensuremath{\eta}}^{\ensuremath{'}}$ meson favors the ${J}^{\mathrm{PC}}={0}^{\ensuremath{-}+}$ classification. The properties of this well-known meson are compared with those of our previously proposed $M(953)$ meson. An important aspect of this study is that we have placed particular emphasis on taking the background into account when we extracted resonance quantities such as the density-matrix elements.
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