Study of J/psi->eta phi pi+pi- at BESIII

Abstract

Based on a sample of $2.25\times 10^{8}J/\psi$ events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay $J/\psi \to \eta \varphi {\pi }^{+}{\pi }^{-}$. The $Y(2175)$ resonance is observed in the invariant mass spectrum of $\varphi f_0(980)$ with a statistical significance of greater than $10\sigma$. The corresponding mass and width are determined to be $M=2200\pm 6(stat.)\pm 5(syst.)\mathrm{MeV}/c^2$ and $\Gamma =104\pm 15(stat.)\pm 15(syst.)$ MeV, respectively, and the product branching fraction is measured to be $\mathcal{B}(J/\psi \to \eta Y(2175)$, $Y(2175)\to \varphi f_0(980)$, $f_0(980)\to {\pi }^{+}{\pi }^{-})=(1.20\pm 0.14(stat.)\pm 0.37(syst.))\times 10^{-4}$. The results are consistent within errors with those of previous experiments. We also measure the branching fraction of $J/\psi \to \varphi f_1(1285)$ with $f_1(1285)\to \eta {\pi }^{+}{\pi }^{-}$ and set upper limits on the branching fractions for $J/\psi \to \varphi \eta (1405)$/$\varphi X(1835)$/$\varphi X(1870)$ with $\eta (1405)$/$X(1835)$/$X(1870)\to \eta {\pi }^{+}{\pi }^{-}$ at the 90\% confidence level.

11 pages, 11 figures

References in corpus (8)

• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• Measurement of e^+e^- to pi^+pi^-J/psi Cross Section via Initial State Radiation at Belle
• X(2175) as a resonant state of the $\varphi K\bar{K}$ system
• 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

Cited by in corpus (16)

• Pentaquark and Tetraquark states
• 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
• $S$- and $P$-wave fully-strange tetraquark states from QCD sum rules
• Partial wave analysis of $\psi (3686)\to K^{+}{K}^{-}\eta$
• QCD sum rule studies on the $ss\bar{s}\bar{s}$ tetraquark states with $J^{PC}=1^{+-}$
• Observation and study of the decay $J/\psi \to \varphi \eta {\eta }^{\prime }$
• Resonances in $e^{+}{e}^{-}$ annihilation near 2.2 GeV
• The $\varphi (2170)$ production in the process $\gamma p\to \eta \varphi p$
• Deciphering the light vector meson contribution to the cross sections of $e^{+}{e}^{-}$ annihilations into the open-strange channels through a combined analysis
• Fully strange tetraquark resonant states as the cousins of $X(6900)$
• Reconciling the X(2240) with the Y(2175)
• Strange Quarkonium States at BESIII
• Higher strangeonium decays into light flavor baryon pairs like $\Lambda \bar{\Lambda }$, $\Sigma \bar{\Sigma }$, and $\Xi \bar{\Xi }$
• Study of $a_0^0(980)$-$f_0(980)$ mixing from $a_0(1450)\to a_0^0(980)f_0(500)\to {\pi }^{+}{\pi }^{-}{f}_0(500)$
• Light tetraquark states with exotic quantum numbers $J^{PC}=2^{+-}$
• Search for the $Y(2175)$ in the photoproduction cross section measurement of $\gamma p\to \varphi {\pi }^{+}{\pi }^{-}p$ at GlueX