Study of $e^{+}{e}^{-}\to \gamma \varphi J/\psi$ from $\sqrt{s}=4.600$ to $4.951$ GeV

Abstract

Using data samples with an integrated luminosity of $6.4$~fb${}^{-1}$ collected by the BESIII detector operating at the BEPCII storage ring, the process of $e^{+}{e}^{-}\to \gamma \varphi J/\psi$ is studied. The processes of $e^{+}{e}^{-}\to \varphi {\chi }_{c1,c2}$, ${\chi }_{c1,c2}\to \gamma J/\psi$ are observed with a significance of more than $10\sigma$. The $\sqrt{s}$-dependent cross section of $e^{+}{e}^{-}\to \varphi {\chi }_{c1,c2}$ is measured between 4.600 and 4.951~GeV, and evidence of a resonance structure is found for the first time in the $\varphi {\chi }_{c2}$ process. We also search for the processes of $e^{+}{e}^{-}\to \gamma X(4140)$, $\gamma X(4274)$ and $\gamma X(4500)$ via the $\gamma \varphi J/\psi$ final state, but no obvious structures are found. The upper limits on the production cross section times the branching fraction for these processes at the 90% confidence level are reported.

arXiv comment35 pages, 9 figures

References in corpus (15)

• The hidden-charm pentaquark and tetraquark states
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• The $XYZ$ states: experimental and theoretical status and perspectives
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data
• Charmonium Decays of $Y(4260), psi(4160), and psi(4040)
• The Vector and Axial-Vector Charmonium-like States
• Excited heavy tetraquarks with hidden charm
• Understanding the internal structures of the $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$
• Scalar tetraquark state candidates: $X(3915)$, $X(4500)$ and $X(4700)$
• Exotic resonances due to $\eta$ exchange
• Hidden charmed states and multibody color flux-tube dynamics
• Y(4626) as a molecular state from interaction $D_s^{\ast }{\bar{D}}_{s1}(2536)-D_s{\bar{D}}_{s1}(2536)$
• $XYZ$ particles at Belle
• The $X(4140)$ and $X(4160)$ resonances in the $e^{+}{e}^{-}\to \gamma J/\psi \varphi$ reaction

Cited by in corpus (4)

• Observation of a vector charmoniumlike state at 4.7 $\mathrm{GeV}/c^2$ and search for $Z_{cs}$ in $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$
• Cross section measurement of $e^{+}{e}^{-}\to \eta \psi (2S)$ and search for $e^{+}{e}^{-}\to \eta \tilde{X}(3872)$
• 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
• Search for the $e^{+}{e}^{-}\to \varphi {\chi }_{c1}(3872)$ process at BESIII