Speaker
Description
This presentation will discuss recent experimental discoveries in the realm of charmonium decays, containing four independent measurements at BESIII. 1) The observation of the ψ(3686) → 3ϕ decay. This observation sheds light on the rare decay process of the ψ(3686) resonance into three φ mesons, providing valuable insights into the dynamics of charmonium decays. No significant structure is observed in the ϕϕ invariant mass. 2) The search for ηc(2S) → π+π−ηc and ηc(2S) → π+π−K0SK±π∓ decays. This study aims to explore the decay properties of the ηc(2S) meson, offering new perspectives on its decay modes and contributing to our understanding of charmonium states. 3) The observation of the ψ(3686) → Ω−K+ anti-Ξ0 + c.c. decay. This process is observed for the first time. Possible baryon excited states are searched for in this decay, but no evident intermediate state is observed with the current sample size. 4) The observation of χcJ → 3(K+K−). All the decays from χc0, χc1, and χc2 are observed for the first time.
| session | F. Heavy Flavor and Quarkonia |
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