Search for the exotic states at Belle
C. P. Shen (for the Belle Collaboration)

TL;DR
This paper reviews recent Belle experiment results on charmonium-like exotic states, including searches for Y(4140) and X(4350), with some new potential resonance signals observed in two-photon processes.
Contribution
It reports new measurements and searches for exotic charmonium-like states, including the observation of a narrow peak at 4350.6 MeV/c^2, expanding the understanding of these states.
Findings
No signal for Y(4140) in $ o \, o \, o$
Observation of a narrow peak at 4350.6 MeV/$c^2$
Resonant structures in $ o VV$ decays
Abstract
We review recent results on charmonium-like exotic states from the Belle experiment. The two-photon process is measured to search for Y(4140). No signal for the is observed. But a narrow peak with a significance of 3.2 deviations including systematic uncertainty is observed at 4350.6 MeV/ that we named X(4350). We also search for charmonium-like states, including X(3872), Y(4140), X(3915) and X(4350), in and radiative decays. No significant signal of any charmonium-like state is observed. The processes ( or ) are also measured to search for the possible exotic states in low mass region. There are clear resonant structures in all the decay modes.
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