Amplitude analysis and branching fraction measurement of the decay $$ {\textrm{D}}_{\textrm{s}}^{+} $$ → K+π+π−π0
Amplitude analysis and branching fraction measurement of the decay $$ {\textrm{D}}_{\textrm{s}}^{+} $$ → K+π+π−π0
The singly Cabibbo-suppressed decay $D_{s}^{+} \to K^+\pi^{+}\pi^{-}\pi^{0}$ is observed, using a data set corresponding to an integrated luminosity of 6.32 $\rm fb^{-1}$ recorded by the BESIII detector at the centre-of-mass energies between 4.178 and 4.226 GeV. The first amplitude analysis of $D_{s}^{+} \to K^+\pi^{+}\pi^{-}\pi^{0}$ reveals the sub-structures in this decay …