Observation of a structure in $e^{+}{e}^{-}\to \varphi {\eta }^{\prime }$ at $\sqrt{s}$ from 2.05 to 3.08 GeV

Abstract

The process $e^{+}{e}^{-}\to \varphi {\eta }^{\prime }$ has been studied for the first time in detail using data sample collected with the BESIII detector at the BEPCII collider at center of mass energies from 2.05 to 3.08 GeV. A resonance with quantum numbers $J^{PC}=1^{--}$ is observed with mass $M$ = (2177.5 $\pm$ 4.8 (stat) $\pm$ 19.5 (syst)) MeV/$c^2$ and width $\Gamma$ = (149.0 $\pm$ 15.6 (stat) $\pm$ 8.9 (syst)) MeV with a statistical significance larger than 10$\sigma$. The observed structure could be identified with the $\varphi (2170)$, then the ratio of partial width between the $\varphi {\eta }^{\prime }$ by BESIII and $\varphi \eta$ by BABAR is (${\mathcal{B}}_{\varphi \eta }^R{\Gamma }_{ee}^R)/({\mathcal{B}}_{\varphi {\eta }^{\prime }}^R{\Gamma }_{ee}^R)$ = 0.23 $\pm$ 0.10 (stat) $\pm$ 0.18 (syst), which is smaller than the prediction of the $s\bar{s}g$ hybrid models by several orders of magnitude.

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• New Hadron States
• Observation of Y(2175) in $J/\psi \to \eta \varphi f_0(980)$
• Analysis of Y(2175) as a tetraquark state with QCD sum rules
• A Candidate for $1^{--}$ Strangeonium Hybrid
• Y(2175): Distinguish Hybrid State from Higher Quarkonium
• Higher Tetraquark Particles
• The Y(2175) State in the QCD Sum Rule
• Study of J/psi->eta phi pi+pi- at BESIII
• The BESIII Physics Programme
• Observation of a resonant structure in $e^{+}{e}^{-}\to K^{+}{K}^{-}{\pi }^0{\pi }^0$
• Strong and radiative decays of excited vector mesons and predictions for a new $\varphi (1930)$ resonance
• Observation and study of the decay $J/\psi \to \varphi \eta {\eta }^{\prime }$
• Reconciling the X(2240) with the Y(2175)

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