Abstract
We review the recent results for the light exotic hadron states, which are obtained using the data recorded with the BESIII detector at the BEPCII e+e- collider in Beijing, China.
Highlights
The quark model is a valid effective classification scheme in particle physics, which organized the large number of light hadrons successfully and verified by the experiments in the past few decades
Besides the confirmation of X(1835) in J/ψ rediative decay, more structures around 1.85 GeV are observed in various decay modes at BESIII experiment and show connections between each other according to the comparison of mass, width and spin parity
For the searching of glueballs, we presents the partial wave analysis (PWA) results for the rediative decays of J/ψ to ηη, π0π0 and φφ
Summary
The quark model is a valid effective classification scheme in particle physics, which organized the large number of light hadrons successfully and verified by the experiments in the past few decades. The BESIII experiment has successfully accumulated the world’s largest 1,300 million J/ψ events [3] and 450 million ψ(3686) events [4], which offers a clean laboratory to study light exotic hadron states below the open charm threshold. Most of the masses are in agreement with each other and close to the ppmass threshold, while the widths are significantly different Based on these experimental results, one cannot drawn a conclusion about the connections between all these structures. In the latest BESIII result published in 2016 [12], the structure near 1.85 GeV is studied with the decay of J/ψ → γη π+π−, using the 1090 million J/ψ events collected by BESIII detector in 2012. The results are consistent with those of previous experiments within errors
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