Study of the decay in

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Research output: Contribution to journalArticlepeer-review


Based on an collision data sample corresponding to an integrated luminosity of collected with the BESIII detector at , the first amplitude analysis of the singly Cabibbo-suppressed decay is performed. From the amplitude analysis, the component is found to be dominant with a fraction of , where the first uncertainty is statistical and the second systematic. In combination with the absolute branching fraction measured by BESIII, we obtain , where the third uncertainty is due to the branching fraction . The precision of this result is significantly improved compared to the previous measurement. This result also differs from most of theoretical predictions by about , which may help to improve the understanding of the dynamics behind.

Original languageEnglish (US)
Article number012006
JournalPhysical Review D
Issue number1
StatePublished - Jul 1 2021

Bibliographical note

Funding Information:
The BESIII Collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work was supported in part by National Key Research and Development Program of China under Contracts No. 2020YFA0406400 and No. 2020YFA0406300; National Natural Science Foundation of China (NSFC) under Contracts No. 11605124, No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No. 12022510, No. 12035013, and No. 12061131003; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263, No. U1832207, No. U1932101, and No. U1932108; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; Fundamental Research Funds for the Central Universities; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation programme under Marie Sklodowska-Curie Grant No. 894790; German Research Foundation DFG under Contract No. 443159800, Collaborative Research Center CRC 1044, FOR 2359, GRK 214; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, United Kingdom under Contracts No. DH140054 and No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contracts No. DE-FG02-05ER41374 and No. DE-SC-0012069.

Funding Information:
National Key Research and Development Program of China National Natural Science Foundation of China Chinese Academy of Sciences Key Research Program of Frontier Science, Chinese Academy of Sciences 100 Talents Program of CAS Fundamental Research Funds for the Central Universities INPAC Shanghai Key Laboratory for Particle Physics and Cosmology H2020 European Research Council H2020 Marie Sk?odowska-Curie Actions Deutsche Forschungsgemeinschaft Collaborative Research Center Istituto Nazionale di Fisica Nucleare Sezione di Padova Kalkinma Bakanli?i National Science and Technology fund Stiftelsen Olle Engkvist Byggm?stare Science and Technology Facilities Council Knut och Alice Wallenbergs Stiftelse Royal Society Vetenskapsr?det U.S. Department of Energy

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© 2021 Published by the American Physical Society


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