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Observation of the Semileptonic D+ Decay into the K 1 (1270)0 Axial-Vector Meson
(American Physical Society, 2019)
By analyzing a 2.93 fb-1 data sample of e+e- collisions, recorded at a center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we report the first observation of the semileptonic D+ ...