Ablikim, M.Achasov, M. N.Adlarson, P.Ahmed, S.Albrecht, M.Çetin, Serkant Ali2022-11-132022-11-132022Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Amoroso, A., ... & Kupsc, A. (2020). Observation of the Doubly Cabibbo-Suppressed Decay D+→ K+ π+ π− π 0 and Evidence for D+→ K+ ω. Physical review letters, 125(14), 141802.https://doi.org/10.1007/JHEP09(2022)107https://hdl.handle.net/20.500.12713/3359By analyzing e(+)e(-) annihilation data corresponding to an integrated luminosity of 2.93 fb(-1) collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we report the first observations of the doubly Cabibbo-suppressed decays D+ -> K+ pi(0)pi(0) and D+ -> K+ pi(0)eta. The branching fractions of D+ -> K+ pi(0)pi(0) and D+ -> K+ pi(0)eta are measured to be (2.1 +/- 0.4(stat) +/- 0.1(syst)) x 10(-4) and (2.1 +/- 0.5(stat) +/- 0.1(syst)) x 10(-4) with statistical significances of 8.8 sigma and 5.5 sigma, respectively. In addition, we search for the subprocesses D+ -> K*(892)(+)pi(0) and D+-> K*(892)(+)eta with K*(892)(+) -> K+pi(0). The branching fraction of D+ -> K* (892)(+)pi(0) is determined to be (4.4(-1.5stat)(+1.8) +/- 0.2(syst)) x 10(-4), with a statistical significance of 3.2 sigma. No significant signal for D+ -> K* (892)(+)pi(0) is found and we set an upper limit on the branching fraction of this decay at the 90% confidence level to be 5.4 x 10(-4).eninfo:eu-repo/semantics/openAccessBranching FractionCharm Physicse(+)-e(-)ExperimentsFlavour PhysicsArticle9WOS:0008545004000032-s2.0-85138215220Q110.1007/JHEP09(2022)107N/A