R. P. Guo
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View article: Helicity amplitude and branching fraction measurement of $χ_{cJ} \rightarrow Λ\barΛ $
Helicity amplitude and branching fraction measurement of $χ_{cJ} \rightarrow Λ\barΛ $ Open
Utilizing $2712.4 \pm 14.3$ million $ψ(3686)$ events accumulated by the BESIII experiment, we perform a partial wave analysis of $ψ(3686)\rightarrowγχ_{cJ}\rightarrowγΛ\barΛ$ decay ($J=0,1,2$). The ratio of the helicity amplitudes with sam…
View article: Observation of the Electromagnetic Dalitz Transition $h_c \rightarrow e^+e^-η_c$
Observation of the Electromagnetic Dalitz Transition $h_c \rightarrow e^+e^-η_c$ Open
Using $(27.12\pm 0.14)\times10^8$ $ψ(3686)$ decays and data samples of $e^+e^-$ collisions with $\sqrt{s}$ from 4.130 to 4.780~GeV collected with the BESIII detector, we report the first observation of the electromagnetic Dalitz transition…