# Browsing by Author "Cai, X."

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• (American Physical Society, 2012)
The two-photon transition $\psi(3686)→\gamma\gamma J/\psi$ is studied in a sample of $1.06×10^8$ $\psi(3686)$ decays collected by the BESIII detector. The branching fraction is measured to be $(3.1±0.6(\text{stat})_{−1.0 ... • (American Physical Society, 2012) The decays$J/\psi\rightarrow\gamma\pi^+\pi^-\pi^0$and$J/\psi\rightarrow\gamma\pi^0\pi^0\pi^0$are analyzed using a sample of$225\times10^6J/\psi$events collected with the BESIII detector. The decay of$\eta(1405) ...
• (American Physical Society, 2012)
Using a sample of $106×10^6$ $\psi(3686)$ events collected with the BESIII detector at the BEPCII storage ring, we have made the first measurement of the $M1$ transition between the radially excited charmonium $S-wave$ ...
• (American Physical Society, 2012)
Using a sample of $(225.2±2.8)×10^6$ $J/\psi$ events collected with the BESIII detector, we present results of a study of $J/\psi→\gamma\mathit{\Lambda\overline{\Lambda}}$ and report the first observation of the isospin ...
• (American Physical Society, 2012)
The mass and width of the lowest-lying $S$-wave spin singlet charmonium state, the $η_c$, are measured using a data sample of $1.06×10^8 ψ(3686)$ decays collected with the BESIII detector at the BEPCII storage ring. We use ...
• (American Physical Society, 2012)
Using a data sample containing $1.06×10^8 ψ^′$ events collected with the BESIII detector at the BEPCII electron-positron collider, we search for a light exotic particle X in the process $ψ′→π^+π^−J/ψ, J/ψ→γX, X→μ^+μ^−$. ...
• (American Physical Society, 2012)
A partial wave analysis of the $p\bar{p}$ mass-threshold enhancement in the reaction $J/\psi\rightarrow\gamma p\bar{p}$ is used to determine its $J^\text{PC}$ quantum numbers to be $0^{-+}$, its peak mass to be below ...
• (American Physical Society, 2012)
The decays $J/{\psi}{\rightarrow}p\bar{p}$ and $J/{\psi}{\rightarrow}n\bar{n}$ have been investigated with a sample of $225.2×10^6$ $J/{\psi}$ events collected with the BESIII detector at the BEPCII $e^+e^-$ collider. The ...
• (American Physical Society, 2012)
Based on a data sample of $106×10^6$ $\psi '$ events collected with the BESIII detector, the decays $\psi '\rightarrow\gamma\chi_{c0,2}, \chi_{c0,2}\rightarrow\gamma\gamma$ are studied to determine the two-photon widths ...