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Observation of the $X(1840)$ in the $3(pi^+pi^-)$ invariant mass in $J/psirightarrowgamma 3(pi^+pi^-)$ at BESIII is reviewed. With a sample of $225.3times10^6$ $J/psi$ events collected with the BESIII detector at BEPCII, the $X(1840)$ is observed with a statistical significance of $7.6sigma$. The mass, width and product branching fraction of the $X(1840)$ are determined. The decay $eta^primerightarrow 3(pi^+pi^-)$ is searched for, and the upper limit of the branching fraction is set at the 90% confidence level.
With data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies from 4.009 to 4.420 GeV, the process $e^{+} e^{-} to gamma X(3872)$ is observed for the first time with a statistical significance of
Using $2.25times10^{8}$ $J/psi$ events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process $J/psirightarrow pbar{p}a_{0}(980)$, $a_{0}(980)rightarrow pi^{0}eta$ with a significance of $6.5sigma$ (
In recent years, lots of studies of charmonium decays have been performed at BESIII based on large data samples of $J/psi$, $psi(3686)$ and $psi(3770)$. Recent results in searches for radiative transitions of $psi(3770)$ and rare phenomena in charmon
Based on $psi(3686)$ decays of 106 million, the 1.31 billion J/psi events and a data sample of $psi(3770)$ with $2.9~fb^{-1}$ integrated luminosity, many analyses are performed. Exclusively baryonic decays of the $psi(3770)$, the radiative transition
At present very large data samples in the energy region of 2.0-4.6 GeV were accumulated by the BESIII detector, which is operated in the upgraded Beijing electron positron collider (BEPCII). These data samples provide an unprecedented opportunity in