Observation of a resonant structure in $e^{+}{e}^{-}\to \omega \eta$ and another in $e^{+}{e}^{-}\to \omega {\pi }^0$ at center-of-mass energies between 2.00 and 3.08 GeV

Abstract

Born cross sections for the processes $e^{+}{e}^{-}\to \omega \eta$ and $e^{+}{e}^{-}\to \omega {\pi }^0$ have been determined for center-of-mass energies between 2.00 and 3.08 GeV with the BESIII detector at the BEPCII collider. The results obtained in this work are consistent with previous measurements but with improved precision. Two resonant structures are observed. In the $e^{+}{e}^{-}\to \omega \eta$ cross sections, a resonance with a mass of $(2179\pm 21\pm 3)\text{MeV}/c^2$ and a width of $(89\pm 28\pm 5)\text{MeV}$ is observed with a significance of 6.1$\sigma$. Its properties are consistent with the $\varphi (2170)$. In the $e^{+}{e}^{-}\to \omega {\pi }^0$ cross sections, a resonance denoted $Y(2040)$ is observed with a significance of more than 10$\sigma$. Its mass and width are determined to be $(2034\pm 13\pm 9)\text{MeV}/c^2$ and $(234\pm 30\pm 25)\text{MeV}$, respectively, where the first uncertainties are statistical and the second ones are systematic.

14 pages, 5 figures

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Cited by in corpus (8)

• Kaon and strangeonium spectrum in Regge phenomenology
• Light Hybrid Meson Mixing and Phenomenology
• Partial decay widths of $\varphi (2170)$ to kaonic resonances
• The role of the $\omega (4S)$ and $\omega (3D)$ states in mediating the $e^{+}{e}^{-}\to \omega \eta$ and $\omega {\pi }^0{\pi }^0$ processes
• SU(3) analysis of fully-light tetraquarks in heavy meson weak decays
• Mass Spectra of $qq\bar{q}\bar{q}$, $ss\bar{s}\bar{s}$ and $qq\bar{s}\bar{s}$ Tetraquarks using Regge Phenomenology
• Spectroscopic study of $ss\bar{b}\bar{b}$ and $bb\bar{b}\bar{b}$ Tetraquarks using Regge phenomenology
• Broad resonance structure in $e^{+}{e}^{-}\to f_1(1285){\pi }^{+}{\pi }^{-}$ and higher $\rho$-meson excitations