Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'

Abstract

With a sample of (225.2\pm2.8)*10^{6} J/psi events registered in the BESIII detector, J/psi->gamma pi^+ pi^- eta' is studied using two eta' decay modes: eta'->pi^+ pi^- eta and eta' -> gamma rho^0. The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20σ. In addition, in the pi^+pi^-eta' invariant mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2σand 6.4σ, respectively. For the X(1835), the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.

References in corpus (3)

• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• Measurement of the Matrix Element for the Decay ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$
• Baryonium, tetra-quark state and glue-ball in large N_c QCD

Cited by in corpus (87)

• Pentaquark and Tetraquark states
• An updated review of the new hadron states
• Threshold cusps and triangle singularities in hadronic reactions
• A New Hadron Spectroscopy
• Spin-Parity Analysis of ppbar Mass Threshold Structure in J/psi and psi' Radiative Decays
• Understanding the property of $\eta (1405/1475)$ in the $J/\psi$ radiative decay
• Decay of the pseudoscalar glueball into scalar and pseudoscalar mesons
• Study of J/psi->eta phi pi+pi- at BESIII
• Categorizing resonances X(1835), X(2120) and X(2370) in the pseudoscalar meson family
• Observation of an anomalous line shape of the ${\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ mass spectrum near the $p\bar{p}$ mass threshold in $J/\psi \to \gamma {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$
• Observation and Spin-Parity Determination of the $X(1835)$ in $J/\psi \to \gamma K_S^0{K}_S^0\eta$
• On the near-threshold $\bar{p}p$ invariant mass spectrum measured in $J/\psi$ and ${\psi }^{\prime }$ decays
• Light axial vector mesons
• New structures in the proton-antiproton system
• Study of the pseudoscalar glueball in $J/\psi$ radiative decays
• Determination of spin-parity quantum numbers of X(2370) as $0^{-+}$ from $J/\psi \to \gamma K_S^0{K}_S^0{\eta }^{\prime }$
• Study of the near-threshold $\omega \varphi$ mass enhancement in doubly OZI suppressed $J/\psi \to \gamma \omega \varphi$ decays
• Possible structure of the newly found exotic state ${\eta }_1(1855)$
• Excited states of $\varphi$ meson
• Study of resonant structure around 1.8 GeV/$c^2$ and $\eta (1405)$ in $J/\psi \to \omega \eta {\pi }^{+}{\pi }^{-}$
• Baryonia and near-threshold enhancements
• Internal particle width effects on the the triangle singularity mechanism in the study of the $\eta (1405)$ and $\eta (1475)$ puzzle
• $S$- and $P$-wave fully-strange tetraquark states from QCD sum rules
• Observation of a structure at 1.84 GeV/c${}^2$ in the $3({\pi }^{+}{\pi }^{-})$ mass spectrum in $J/\psi \to \gamma 3({\pi }^{+}{\pi }^{-})$ decays
• Light baryonium spectrum
• Observation of a state $X(2600)$ in the ${\pi }^{+}{\pi }^{-}{\eta }^{\prime }$ system in the process $J/\psi \to \gamma {\pi }^{+}{\pi }^{-}{\eta }^{\prime }$
• Study of $J/\psi \to \omega p\bar{p}$ at BESIII
• What can we learn about light-meson interactions at electron-positron colliders?
• Strong decays of the $X(2500)$ newly observed by the BESIII Collaboration
• X(1835), X(2120) and X(2370) in a flux tube model
• Light unflavor vector meson spectroscopy around the mass range of $2.4\sim 3$ GeV and possible experimental evidence
• Influence of the axial anomaly on the decay $N(1535)\to N\eta$
• Potential higher radial excitations in the light pseudoscalar meson family
• ${\chi }_{c0}(1P)$ decay into $\bar{\Sigma }\Sigma \pi$ in search of an $I=1$, $1/2^{-}$ baryon state around $\bar{K}N$ threshold
• First study of η_c, η(1760) and X(1835) production via η'π^+π^- final states in two-photon collisions
• Constructing new pseudoscalar meson nonets with the observed $X(2100)$, $X(2500)$, and $\eta (2225)$
• Study of the $\omega$ meson family and newly observed $\omega$-like state $X(2240)$
• A study of $\eta K\bar{K}$ and ${\eta }^{\prime }K\bar{K}$ with the fixed center approximation to Faddeev equations
• Decays of the vector glueball
• Study of $\eta (1475)$ and $X(1835)$ in radiative $J/\psi$ decays to $\gamma \varphi$
• Observation of the Anomalous Shape of $X(1840)$ in $J/\psi \to \gamma 3({\pi }^{+}{\pi }^{-})$ Indicating a Second Resonance Near $p\bar{p}$ Threshold
• Revisiting the pseudoscalar meson and glueball mixing and key issues in the search for pseudscalar glueball state
• QCD sum rule studies on the $ss\bar{s}\bar{s}$ tetraquark states of $J^{PC}=0^{-+}$
• The Glueball content of ${\eta }_c$
• Studying $X(2100)$ hadronic decays and predicting its pion and kaon induced productions
• Decay modes of the excited pseudoscalar glueball
• Physics Accomplishments and Future Prospects of the BES Experiments at the BEPC Collider
• Fully strange tetraquark resonant states as the cousins of $X(6900)$
• SUSY with R-symmetry: confronting EW precision observables and LHC constraints
• Light 2++ and 0++ mesons
• $J/\psi \to \gamma {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ and the structure observed around the $\bar{p}p$ threshold
• Gluonic nature of the newly observed state $X(2600)$
• Analysis of the X(1835) and related baryonium states with Bethe-Salpeter equation
• Ordinary and exotic mesons in the extended Linear Sigma Model
• Observation of $J/\psi$ Electromagnetic Dalitz Decays to $X(1835)$, $X(2120)$ and $X(2370)$
• Strange Quarkonium States at BESIII
• SU(3) analysis of fully-light tetraquarks in heavy meson weak decays
• Decay of the pseudoscalar glueball and its first excited state into scalar and pseudoscalar mesons and their first excited states
• QCD Exotics
• Fully-strange tetraquark states with the exotic quantum numbers $J^{PC}=0^{+-}$ and $2^{+-}$
• Glueball Production via Gluonic Penguin B Decays
• The fully-light vector tetraquark states with explicit P-wave via the QCD sum rules
• Measurement of the branching fraction of $J/\psi \to \omega {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ and search for $J/\psi \to \omega X(1835),X(1835)\to {\eta }^{\prime }{\pi }^{+}{\pi }^{-}$ decay
• Search for the $X(2370)$ and observation of ${\eta }_c\to \eta \eta {\eta }^{\prime }$ in $J/\psi \to \gamma \eta \eta {\eta }^{\prime }$
• The proton-antiproton mass threshold structure in psi(3686) radiative decay revisited
• Observation of $\psi (3686)\to p\bar{p}\varphi$
• X(2370) glueball-like particle productions in $e^{+}{e}^{-}$ collisions at the BESIII energy and in pp collisions at the LHC energy with PACIAE model
• Modelling glueballs
• Looking for bound states and resonances in the ${\eta }^{\prime }K\bar{K}$ system
• Light tetraquark states with the exotic quantum number $J^{PC}=3^{-+}$
• Protonium: Discovery and Prediction
• Search for the process $e^{+}{e}^{-}\to J/\psi +X(1835)$ at $\sqrt{s}\approx 10.6$GeV
• Coupled-channel analysis of the near-threshold $e^{+}{e}^{-}\to N\bar{N}$ cross sections
• 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
• Highlights of recent BESIII results
• Decay Widths of X(1835) as Nucleon-Antinucleon Bound State
• Mass spectrum of the $\Omega \bar{\Omega }$ states
• Nature of $X(2370)$
• Baryons and baryoniums in the perspective of QCD sum rules
• On the Utility Function of Experiments in Fundamental Science
• Fully strange tetraquark states via QCD sum rules
• An alternative interpretation of Belle data on γ-γ-> η'-π^+-π^-
• Light hadron, Charmonium(-like) and Bottomonium(-like) states
• Hadron and Quarkmonium Exotica
• Observation of the $X(1840)$ at BESIII
• Recent Results on Hadron Spectroscopy from BESIII
• Charmonium and Light Meson Spectroscopy