Observation of $D^{+}\to K_S^0{a}_0(980{)}^{+}$ in the amplitude analysis of $D^{+}\to K_S^0{\pi }^{+}\eta$

BESIII Collaboration, M. Ablikim, M. N. Achasov +615

We perform for the first time an amplitude analysis of the decay $D^{+}\to K_S^0{\pi }^{+}\eta$ and report the observation of the decay $D^{+}\to K_S^0{a}_0(980{)}^{+}$ using 2.93 fb$^…