TheKS0KS0π0system produced inπ−pinteractions at 21.4 GeV/c

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Abstract

The ${K}_{S}^{0}{K}_{S}^{0}{\ensuremath{\pi}}^{0}$ systems, a pure $C=+1$ state, has been studied in the reaction ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{K}_{S}^{0}{K}_{S}^{0}{\ensuremath{\pi}}^{0}n$ at 21.4 GeV/c. The ${K}_{S}^{0}{K}_{S}^{0}{\ensuremath{\pi}}^{0}$ spectrum is significantly different from the $K\overline{K}\ensuremath{\pi}$ distribution observed in other lower-energy peripheral hadroproduction experiments. In addition to production of the ${f}_{1}(1285)$, evidence for production of the $\ensuremath{\eta}(1460)$ [sometimes called the $\ensuremath{\iota}(1460)$] based on mass spectra and a Dalitz-plot spin-parity analysis is reported. The narrower, lower-mass state observed in other $K\overline{K}\ensuremath{\pi}$ experiments is observed weakly if at all in this experiment. Hadronic production of the $\ensuremath{\eta}(1460)$, which is a good glueball candidate because of its presence in $\frac{J}{\ensuremath{\psi}}$ radiative decay, suggests possible mixing with the $q\overline{q}$ sector.

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