arXiv subjects

Limin Yuan

Publications and source records attributed to Limin Yuan.

2 recordsLinked to original sources

arXiv2018

Study on the resonant parameters of $Y(4220)$ and $Y(4390)$

Many vector charmonium-like states have been reported recently in the cross sections of $e^+e^- \rightarrow ωχ_{c0}$, $π^{+}π^{-}h_c$, $π^{+}π^{-}J/ψ$, $π^{+}π^{-}ψ(3686)$ and $π^{+}D^{0}D^{*-}+c.c.$ To better understand the nature of these states, a combined fit is performed to these cross sections by using three resonances $Y(4220)$, $Y(4390)$ and $Y(4660)$. The resonant parameters for the three resonances are obtained. We emphasize that two resonances $Y(4220)$ and $Y(4390)$ are sufficient to explain these cross sections below 4.6 GeV. The lower limits of $Y(4220)$ and $Y(4390)$'s leptonic decay widths are also determined to be $(36.4\pm2.0\pm4.2)$ and $(123.8\pm6.5\pm9.0)$ eV.

hep-ph↗

arXiv2018

Search for vector charmonium(-like) states in $e^+e^- \rightarrow ωχ_{cJ}$

The cross sections of $e^+e^- \rightarrow ωχ_{cJ(J=0,1,2)}$ have been measured by BESIII. We try to search for vector charmonium(-like) states $Y(4220)$, $Y(4360)$, $ψ(4415)$ and $Y(4660)$ in the $e^+e^- \rightarrow ωχ_{cJ(J=0,1,2)}$ line shapes. The $ωχ_{c0}$ mainly comes from $Y(4220)$, $ωχ_{c1}$ mainly comes from $Y(4660)$ and $ωχ_{c2}$ mainly comes from $ψ(4415)$, maybe partly comes from $Y(4360)$ or $Y(4660)$. For the charmonium(-like) states that are not significant in the $e^+e^- \rightarrow ωχ_{cJ(J=0,1,2)}$ line shape, we also give the $90\%$ confidence level upper limits on the electron partial width multiplied by branching fraction. These results are helpful to study the nature of charmonium(-like) states in this energy region.

hep-ph↗