Observation of theψ(1 D23)State ine+e−→π+π−γχc1at BESIII

Amplitude analysis and branching-fraction measurement of Ds+→KS0K−π+π+

Using 6.32  fb−1 of e+e− collision data collected by the BESIII detector at the center-of-mass energies between 4.178 and 4.226 GeV, an amplitude analysis of the D+s → K0SK−π+π+ decays is performed ...