PAO-TI CHANG et al.2019-09-092019-09-092002-01-0100319007https://scholars.lib.ntu.edu.tw/handle/123456789/418075The [Formula presented] meson decay modes [Formula presented] and [Formula presented] have been studied using [Formula presented] of data collected with the Belle detector at KEKB. The [Formula presented] and [Formula presented] decays have been observed for the first time with branching fractions [Formula presented] and [Formula presented]. No signal has been found for the [Formula presented] and [Formula presented] decay modes, and the corresponding upper limits at [Formula presented] C.L. are presented. © 2002 The American Physical Society.journal article10.1103/PhysRevLett.89.1518022-s2.0-85038268008https://api.elsevier.com/content/abstract/scopus_id/85038268008