Observation of the $Y(4230)$ and evidence for a new vector charmonium-like state $Y(4710)$ in $e^{+}{e}^{-}\to K_S^0{K}_S^{0}J/\psi$

Abstract

Cross sections for the process $e^{+}{e}^{-}\to K_S^0{K}_S^{0}J/\psi$ at center-of-mass energies from $4.128$ to $4.950$ GeV are measured using data samples with a total integrated luminosity of 21.2 fb${}^{-1}$ collected by the BESIII detector operating at the BEPCII storage ring. The $Y(4230)$ state is observed in the energy dependence of the $e^{+}{e}^{-}\to K_S^0{K}_S^{0}J/\psi$ cross section for the first time with a statistical significance of 26.0$\sigma$. In addition, an enhancement around $4.710$ GeV, called the $Y(4710)$, is seen with a statistical significance of 4.2$\sigma$. There is no clear structure around $4.484$ GeV. Using a fit with a coherent sum of three Breit-Wigner functions, we determine the mass and width of the $Y(4230)$ state to be $4226.9\pm 6.6\pm 21.9$ MeV/$c^2$ and $71.7\pm 16.2\pm 31.4$ MeV, respectively, and the mass and width of the $Y(4710)$ state to be $4704.0\pm 52.3\pm 69.5$ MeV/$c^2$ and $183.2\pm 114.0\pm 90.8$ MeV, respectively, where the first uncertainties are statistical and the second are systematic. In addition, the average Born cross section ratio of $e^{+}{e}^{-}\to K_S^0{K}_S^{0}J/\psi$ to $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ is measured to be $0.388_{-0.028}^{+0.035}\pm 0.016$, or $0.426_{-0.031}^{+0.038}\pm 0.018$ if three-body phase space is considered.

arXiv commentUpdate draft based the comments from PRD referee

References in corpus (48)

• Heavy quarkonium: progress, puzzles, and opportunities
• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Higher Charmonia
• Observation of a Broad Structure in the ${\pi }^{+}{\pi }^{-}J/\psi$ Mass Spectrum around 4.26 GeV/$c^2$
• Limits and Confidence Intervals in the Presence of Nuisance Parameters
• Future Physics Programme of BESIII
• Measurement of e^+e^- to pi^+pi^-J/psi Cross Section via Initial State Radiation at Belle
• Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data
• Decoding the riddle of Y(4260) and $Z_c(3900)$
• Consequences of Heavy Quark Symmetries for Hadronic Molecules
• Precise measurement of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}J/\psi$ cross section at center-of-mass energies from 3.77 to 4.60 GeV
• Charmonium Decays of $Y(4260), psi(4160), and psi(4040)
• Gluonic charmonium resonances at BaBar and Belle?
• Four Quark Interpretation of Y(4260)
• Are Y(4260) and {\rm Z${}_2^{+}$(4250)} ${\mathrm{D}}_1\mathrm{D}$ or ${\mathrm{D}}_0{\mathrm{D}}^{\ast }$ Hadronic Molecules?
• Method for detector description transformation to Unity and application in BESIII
• The Possible Interpretations of Y(4260)
• Evidence of Two Resonant Structures in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{h}_c$
• Suppressed decay into open charm for the Y(4260) being an hybrid
• Precision measurement of the integrated luminosity of the data taken by BESIII at center of mass energies between 3.810 GeV and 4.600 GeV
• Measurement of the near-threshold $e^{+}{e}^{-}\to D\bar{D}$ cross section using initial-state radiation
• Study of $e^{+}{e}^{-}\to \omega {\chi }_{cJ}$ at center-of-mass energies from 4.21 to 4.42 GeV
• A J^PG=1++ Charged Resonance in the Y(4260) to pi+pi- J/psi Decay?
• How the Z_c(3900) Reveals the Spectra of Quarkonium Hybrid and Tetraquark Mesons
• Study of the Exclusive Initial-State Radiation Production of the $D\bar{D}$ System
• Exclusive event generator for $e^{+}{e}^{-}$ scan experiments
• Measurement of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (3686)$ from 4.008 to 4.600$\sim$GeV and observation of a charged structure in the ${\pi }^{\pm }\psi (3686)$ mass spectrum
• Exploring the threshold behavior and implications on the nature of Y(4260) and $Z_c(3900)$
• Y(4260) and Y(4360) as mixed hadrocharmonium
• Issues and Opportunities in Exotic Hadrons
• Luminosities and energies of $e^{+}{e}^{-}$ collision data taken between $\sqrt{s}$=4.612 GeV and 4.946 GeV at BESIII
• Hadro-quarkonium from Lattice QCD
• Measurement of integrated luminosities at BESIII for data samples at center-of-mass energies between 4.0 and 4.6 GeV
• The beam energy measurement system for the Beijing electron-positron collider
• Cross section measurements of $e^{+}{e}^{-}\to \omega {\chi }_{c0}$ from $\sqrt{s}=$4.178 to 4.278 GeV
• Observation of the $Y(4230)$ and a new structure in $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$
• Study of the process $e^{+}{e}^{-}\to {\pi }^0{\pi }^{0}J/\psi$ and neutral charmonium-like state $Z_c(3900{)}^0$
• Strong decays of higher charmonium states into open-charm meson pairs
• Measurement of the $e^{+}{e}^{-}\to \eta J/\psi$ cross section and search for $e^{+}{e}^{-}\to {\pi }^{0}J/\psi$ at center-of-mass energies between 3.810 and 4.600~GeV
• Updated Cross Section Measurement of $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ and $K_S^0{K}_S^{0}J/\psi$ via Initial State Radiation at Belle
• Measurements of the center-of-mass energies of $e^{+}{e}^{-}$ collisions at BESIII
• Observation of e+e- to K+K-J/psi via Initial State Radiation at Belle
• Possible psi(5S), psi(4D), psi(6S) and psi(5D) signals in Lambda(c)-antiLambda(c)
• Cross Section Measurement of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (3686)$ from $\sqrt{s}=4.0076$~GeV to 4.6984~GeV
• Observation of $e^{+}{e}^{-}\to K\bar{K}J/\psi$ at center-of-mass energies from 4.189 to 4.600 GeV
• Measurement of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0\psi (3686)$ at $\sqrt{s}$ from 4.009 to 4.600 GeV and observation of a neutral charmoniumlike structure

Cited by in corpus (15)

• One Born$-$Oppenheimer Effective Theory to rule them all: hybrids, tetraquarks, pentaquarks, doubly heavy baryons and quarkonium
• Production of exotic hadrons in $pp$ and nuclear collisions
• Observation of a vector charmoniumlike state at 4.7 $\mathrm{GeV}/c^2$ and search for $Z_{cs}$ in $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$
• Global coupled-channel analysis of $e^{+}{e}^{-}\to c\bar{c}$ processes in $\sqrt{s}=3.75-4.7$ GeV
• Colloquium: Hadron Production in Open-charm Meson Pair at $e^{+}{e}^{-}$ Collider
• Measurement of $e^{+}{e}^{-}\to \eta J/\psi$ Cross Section from $\sqrt{s}=$ 3.808 GeV to 4.951 GeV
• Status and Prospects of Exotic Hadrons at Belle II
• $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross sections and the ${\Lambda }_c^{+}$ electromagnetic form factors within the extended vector meson dominance model
• Production of charmonium ${\chi }_{cJ}(2P)$ plus one $\omega$ meson by $e^{+}{e}^{-}$ annihilation
• The $B^{-}\to J/\psi {\eta }^{\prime }{K}^{-}$ reaction and the $Y(4710)$ and $K_0^{\ast }(1430)$ contributions
• Search for $e^{+}{e}^{-}\to \varphi {\chi }_{c0}$ and $\varphi {\eta }_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV
• Measurement of the Inclusive Cross Sections of Prompt $J/\psi$ and $\psi (3686)$ Production in $e^{+}{e}^{-}$ Annihilation from $\sqrt{s}=3.808$ to $4.951$ GeV
• Pinpointing Physical Solutions in Y(4230) Decays
• Cross section measurement of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0\psi (3686)$ from $\sqrt{s}=$ 4.008 GeV to 4.951 GeV
• Study of $e^{+}{e}^{-}\to h^{+}{h}^{-}J/\psi (h=\pi ,K,p)$ via initial-state radiation at Belle~II