Observation of Y(2175) in $J/\psi \to \eta \varphi f_0(980)$

Abstract

The decays of $J/\psi \to \eta \varphi f_0(980)(\eta \to \gamma \gamma ,\varphi \to K^{+}{K}^{-},f_0(980)\to {\pi }^{+}{\pi }^{-})$ are analyzed using a sample of $5.8\times 10^7$ $J/\psi$ events collected with the BESII detector at the Beijing Electron-Positron Collider (BEPC). A structure at around $2.18$GeV/$c^2$ with about $5\sigma$ significance is observed in the $\varphi f_0(980)$ invariant mass spectrum. A fit with a Breit-Wigner function gives the peak mass and width of $m=2.186\pm 0.010(stat)\pm 0.006(syst)$GeV/$c^2$ and $\Gamma =0.065\pm 0.023(stat)\pm 0.017(syst)$GeV/$c^2$, respectively, that are consistent with those of Y(2175), observed by the BABAR collaboration in the initial-state radiation (ISR) process $e^{+}{e}^{-}\to {\gamma }_{ISR}\varphi f_0(980)$. The production branching ratio is determined to be $Br(J/\psi \to \eta Y(2175))\cdot Br(Y(2175)\to \varphi f_0(980))\cdot Br(f_0(980)\to {\pi }^{+}{\pi }^{-})=(3.23\pm 0.75(stat)\pm 0.73(syst))\times 10^{-4}$, assuming that the Y(2175) is a $1^{--}$ state.

5 pages, 4 figures, accepted by Phys. Rev. Lett

References in corpus (2)

• Analysis of Y(2175) as a tetraquark state with QCD sum rules
• A Candidate for $1^{--}$ Strangeonium Hybrid

Cited by in corpus (39)

• Pentaquark and Tetraquark states
• Exotics: Heavy Pentaquarks and Tetraquarks
• The Exotic XYZ Charmonium-like Mesons
• X(2175) as a resonant state of the $\varphi K\bar{K}$ system
• Higher Tetraquark Particles
• Solution to Faddeev equations with two-body experimental amplitudes as input and application to J^P=1/2^+, S=0 baryon resonances
• The Y(2175) State in the QCD Sum Rule
• Study of J/psi->eta phi pi+pi- at BESIII
• On the possibility of Deeply Bound Hadronic Molecules from single Pion Exchange
• Production of the Exotic $1^{--}$ Hadrons $\varphi (2170)$, X(4260) and $Y_b(10890)$ at the LHC and Tevatron via the Drell-Yan Mechanism
• On the ϕ(1020)f_0(980) S-wave scattering and the Y(2175) resonance
• Fully-strange tetraquark $ss\bar{s}\bar{s}$ spectrum and possible experimental evidence
• Mass spectrum and strong decays of strangeonium in a constituent quark model
• Observation of a vector charmoniumlike state in $e^{+}{e}^{-}\to D_s^{+}{D}_{s1}(2536{)}^{-}+c.c.$
• $S$- and $P$-wave fully-strange tetraquark states from QCD sum rules
• ϕK^{+}K^{-} production in electron-positron annihilation
• Partial wave analysis of $\psi (3686)\to K^{+}{K}^{-}\eta$
• Study of the process $e^{+}{e}^{-}\to \varphi \eta$ at center-of-mass energies between 2.00 and 3.08 GeV
• QCD sum rule studies on the $ss\bar{s}\bar{s}$ tetraquark states with $J^{PC}=1^{+-}$
• Observation and study of the decay $J/\psi \to \varphi \eta {\eta }^{\prime }$
• Light unflavor vector meson spectroscopy around the mass range of $2.4\sim 3$ GeV and possible experimental evidence
• Properties of $P_c(4312)$ pentaquark and its bottom partner
• Resonances in $e^{+}{e}^{-}$ annihilation near 2.2 GeV
• The $\varphi (2170)$ production in the process $\gamma p\to \eta \varphi p$
• Cross section measurement of $e^{+}{e}^{-}\to K_S^0{K}_L^0$ at $\sqrt{s}=2.00-3.08\mathrm{GeV}$
• The phi(1020) a0(980) S-wave scattering and hints for a new vector-isovector resonance
• Deciphering the light vector meson contribution to the cross sections of $e^{+}{e}^{-}$ annihilations into the open-strange channels through a combined analysis
• Strangeonium-like hybrids on the lattice
• Fully strange tetraquark resonant states as the cousins of $X(6900)$
• Partial decay widths of $\varphi (2170)$ to kaonic resonances
• Reconciling the X(2240) with the Y(2175)
• Chiral Unitary Dynamics of Hadrons and Hadrons in a Nuclear Medium
• Strange Quarkonium States at BESIII
• Higher strangeonium decays into light flavor baryon pairs like $\Lambda \bar{\Lambda }$, $\Sigma \bar{\Sigma }$, and $\Xi \bar{\Xi }$
• The fully-light vector tetraquark states with explicit P-wave via the QCD sum rules
• The ground states and the first radially excited states of D-wave vector $\rho$ and $\varphi$ mesons
• Light tetraquark states with exotic quantum numbers $J^{PC}=2^{+-}$
• Likelihood analysis of the newly observed $f_0(2020)$, $f_0(2330)$, and $f_0(2470)$ in $J/\psi \to \gamma {\eta }^{\prime }{\eta }^{\prime }$ as high-lying unflavored scalar mesons
• Search for the $Y(2175)$ in the photoproduction cross section measurement of $\gamma p\to \varphi {\pi }^{+}{\pi }^{-}p$ at GlueX