Q. Ji

collaborators

2 papers

hep-ex2025

Study of the electromagnetic Dalitz decay $J / ψ \to e^{+} e^{-} π^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +640

We report the first measurement of the di-electron invariant mass dependent transition form factor in the electromagnetic Dalitz decay $J / ψ \to e^{+} e^{-} π^{0}$ using $(10087 \pm 44) \ti…

hep-ex2024

Observation of the charmonium decay $η_{c} \to γ γ$ in $J / ψ \to γ η_{c}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +662

Using $(2712.4 \pm 14.3) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector at the BEPCII collider, the decay $η_{c} \to γ γ$ in $J / ψ \to γ η_{c}$ is observed. We determine the p…

Study of the electromagnetic Dalitz decay J/ψ→e+e−π0

Observation of the charmonium decay ηc​→γγ in J/ψ→γηc​

Study of the electromagnetic Dalitz decay $J / ψ \to e^{+} e^{-} π^{0}$

Observation of the charmonium decay $η_{c} \to γ γ$ in $J / ψ \to γ η_{c}$