Speaker
Description
Utilizing the world’s largest ψ(3686) data sample, the BESIII experiment
has conducted detailed studies of several critical charmonium decays. This talk will
focus on three landmark results: 1) Precision measurement of $η_c \to γγ$ via the decay
chain $ψ(3686) → π⁺π⁻J/ψ$; $J/ψ → γη_c$, achieving the most accurate determination of
this branching fraction to date. 2) First observations of $h_c$ radiative decays into
γπ⁺π⁻, γπ⁺π⁻η, γ2(π⁺π⁻), $γp\bar{p}$, and the resonant channel $h_c → γf_2(1270) → γπ⁺π⁻$,
unveiling novel insights into the hadronic transition dynamics of the $h_c$; 3)
High-precision studies of $χ_c^0$ decays into π⁺π⁻ and K⁺K⁻ final states, including
the determination of $χ_c^0$ resonance parameters (mass and width) with unprecedented
precision. These results provide critical constraints on theoretical models of $χ_c^0$
production and its potential gluonic content, advancing the search for glueball
candidates in the charmonium mass region.
Details
N/A
| Internet talk | Maybe |
|---|---|
| Is this an abstract from experimental collaboration? | Yes |
| Name of experiment and experimental site | BESIII, IHEP, Beijing, China |
| Is the speaker for that presentation defined? | No |
