Amplitude analysis and branching fraction measurement of the decay $$ {D}_s^{+} $$ ? K+?+??

A bstract Using 6 . 32 fb ? 1 of e + collision data collected at the center-of-mass energies between 4.178 and 4.226 GeV with BESIII detector, we perform an amplitude analysis decay $$ {D}_s^{+} D s + ? K ? determine amplitudes various intermediate states. The absolute branching fraction is measured to be (6 11 ± 0 18 stat syst ) × 10 3 fractions dominant processes ? , * (892) are determined (1 96 19 23 85 12 13 respectively. resonances f (500), (980), (1370) observed for first time in this channel.