Existence Of Xi-Resonances Above 2 Gev

PHYSICAL REVIEW LETTERS(1983)

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摘要
${{\\ensuremath{\\Xi}}^{*}}^{\\ensuremath{-}}$ production was studied in the reaction ${K}^{\\ensuremath{-}}+p\\ensuremath{\\rightarrow}{{K}^{+}}_{\\mathrm{slow}}+{X}^{\\ensuremath{-}}$ at 5 GeV/c. The slow ${K}^{+}$ was electronically detected, while the ${X}^{\\ensuremath{-}}$ was observed as a missing mass, thus allowing for observation of all ${\\ensuremath{\\Xi}}^{*}$ independent of decay mode. The observed $\\ensuremath{\\Xi}$ states were $\\ensuremath{\\Xi}(1320)$, $\\ensuremath{\\Xi}(1530)$, $\\ensuremath{\\Xi}(1820)$, $\\ensuremath{\\Xi}(2030)$, $\\ensuremath{\\Xi}(2250)$, $\\ensuremath{\\Xi}(2370)$, and $\\ensuremath{\\Xi}(2500)$. These data establish and confirm the existence of $\\ensuremath{\\Xi}(2250)$ and indicate a peculiar production-cross-section behavior for the ${\\ensuremath{\\Xi}}^{*}(2370)$.
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