ﻻ يوجد ملخص باللغة العربية
The cross sections of $e^+e^- rightarrow omegachi_{cJ(J=0,1,2)}$ have been measured by BESIII. We try to search for vector charmonium(-like) states $Y(4220)$, $Y(4360)$, $psi(4415)$ and $Y(4660)$ in the $e^+e^- rightarrow omegachi_{cJ(J=0,1,2)}$ line shapes. The $omegachi_{c0}$ mainly comes from $Y(4220)$, $omegachi_{c1}$ mainly comes from $Y(4660)$ and $omegachi_{c2}$ mainly comes from $psi(4415)$, maybe partly comes from $Y(4360)$ or $Y(4660)$. For the charmonium(-like) states that are not significant in the $e^+e^- rightarrow omegachi_{cJ(J=0,1,2)}$ 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.
The cross section of $e^+e^- rightarrow eta J/psi$ has been measured by BESIII and Belle experiments. Fit to the $e^+e^- rightarrow eta J/psi$ line shape, three resonant structures are evident. The parameters for the three resonant structures are $M_
We search for the process $e^{+}e^{-}rightarrow pi ^{+}pi ^{-} chi_{cJ}$ ($J=0,1,2$) and for a charged charmonium-like state in the $pi ^{pm} chi_{cJ}$ subsystem. The search uses data sets collected with the BESIII detector at the BEPCII storage ring
Using $4.479 times 10^{8}$ $psi(3686)$ events collected with the BESIII detector, we search for the decays $psi(3686) rightarrow e^{+}e^{-}chi_{c0,1,2}$ and $chi_{c0,1,2} rightarrow e^{+}e^{-}J/psi$. The decays $psi(3686) rightarrow e^{+}e^{-}chi_{c0
We report the measurement of $e^+e^- to D^+_sD^*_{s2}(2573)^-+c.c.$ via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb$^{-1}$ collected with the Belle detector at the $Upsilon(4S)$ and nearby. We find evidence for
We report BELLE measurements of the exclusive cross sections for the processes e+e-->DD*, e+e-->DD, e+e-->DDpi, the first observation of psi(4415)-> DD*2(2460)bar decay and new state, Y(4660), using ISR. In addition, another cluster of events at around 4.05GeV/c2 is reported.