Observation of the Doubly Cabibbo-Suppressed Decay and Evidence for
Using 2.93 fb–1 of e+e– collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, the first observation of the doubly Cabibbo-suppressed decay D+ → K+π+π–π0 is reported. After removing decays that contain narrow intermediate resonances, including D+ → K+η , D+ → K+ω, and D+ → K+Φ, the branching fraction of the decay D+ → K+π+π–π0 is measured to be (1.13 ± 0.08stat ± 0.03syst) × 10–3. The ratio of branching fractions of D+ → K+π+π–π0 over D+ → K–π+π+π0 is found to be (1.81 ± 0.15)%, which corresponds to (6.28 ± 0.52) tan4 θC, where θC is the Cabibbo mixing angle. This ratio is significantly larger than the corresponding ratios for other doubly Cabibbo-suppressed decays. The asymmetry of the branching fractions of charge-conjugated decays D± → K±π±π∓π0 is also determined, and no evidence for CP violation is found. In addition, the first evidence for the D+ → K+ω decay, with a statistical significance of 3.3σ, is presented and the branching fraction is measured to be B(D+ → K+ω) = (5.7 $$^{+2.5}_{–2.1 stat}$$ ± 0. 2syst) × 10–5.
- Research Organization:
- Indiana Univ., Bloomington, IN (United States); Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), High Energy Physics (HEP); National Key Basic Research Program of China; National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences (CAS); European Research Council (ERC); German Research Foundation (DFG); Ministry of Development of Turkey; Olle Engkvist Foundation; Knut and Alice Wallenberg Foundation; Royal Society, UK
- Contributing Organization:
- BESIII Collaboration
- Grant/Contract Number:
- FG02-05ER41374; SC0012069; 2015CB856700; 11805037; 11775230; 11625523; 11635010; 11735014; 11822506; 11835012, No. 11935015; 11935016; 11935018; 11961141012; U1832121; U1732263; U1832207; QYZDJ-SSW-SLH003; QYZDJ-SSW-SLH040; 758462; CRC 1044; FOR 2359; GRK 214; DPT2006K-120470; 200-0605; 2016.0157; DH140054; DH160214
- OSTI ID:
- 1669187
- Alternate ID(s):
- OSTI ID: 1701743
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Vol. 125 Journal Issue: 14; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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