Measurement of the branching fraction of the doubly Cabibbo-suppressed decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> and search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>
G. Chelkov(Joint Institute for Nuclear Research), X. R. Chen(University of Science and Technology of China), A. Brueggemann(University of Münster), C. Chen(Nankai University), W. S. Cheng(University of Turin), N. Berger(Johannes Gutenberg University Mainz), M. Albrecht(Thomas Jefferson National Accelerator Facility), M. R. An(Liaoning Normal University), A. Bortone(University of Turin), X. H. Bai(University of Jinan), G. F. Cao(Institute of High Energy Physics), K. Begzsuren(Institute of Physics and Technology), J. Bloms(University of Münster), R. Aliberti(University of Turin), I. Balossino(Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara), A. Calcaterra(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati), I. Boyko(Joint Institute for Nuclear Research), Z. J. Chen(Hunan University), S. J. Chen(Nanjing University), G. Cibinetto, J. F. Chang(Inner Mongolia University), X. Z. Cai(State Forestry and Grassland Administration), X. T. Chen(Institute of Modern Physics), Y. B. Chen(Institute of High Energy Physics), G. Chen(Institute of High Energy Physics), F. Cossio(University of Turin), A. Amoroso(University of Turin), M. L. Chen(University of Chinese Academy of Sciences), H. Cai(Wuhan University), М. Н. Ачасов(Uppsala University), R. A. Briere(Carnegie Mellon University), T. Chen(Institute of High Energy Physics), H. S. Chen(Institute of High Energy Physics), R. Baldini Ferroli(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati), P. Adlarson(Uppsala University), V. Batozskaya(National Centre for Nuclear Research), Qi An(Chinese Academy of Sciences), M. Bertani(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati), N. Cao(University of Chinese Academy of Sciences), W. L. Chang(Institute of High Energy Physics), J. J. Cui(Shandong University), D. Becker(Johannes Gutenberg University Mainz), Y. Ban(Peking University), O. Bakina(Joint Institute for Nuclear Research), Y. Bai(Southeast University), D. Bettoni(Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara), S. A. Çetin(Doğuş University), F. Bianchi(University of Turin)
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