Measurements of the mass and width of the $\eta_c$ using the decay $\psi(3686)\rightarrow\gamma\eta_c$
F. De Mori, Mikhail N. Achasov, Diego Alberto, D. Ambrose et autres
The mass and width of the lowest-lying $S$-wave spin singlet charmonium state, the $η_c$, are measured using a data sample of $1.06×10^8 ψ(3686)$ decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates full interference …
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