Study of the decay D+ → K(892) + K0S in D+ → K+ K0Sπ0

Based on an e+e− collision data sample corresponding to an integrated luminosity of 2.93 fb − 1 collected with the BESIII detector at √s = 3.773 GeV , the first amplitude analysis of the singly Cabibbo-suppressed decay D+ → K+K0Sπ0 is performed. From the amplitude analysis, the K*(892) + K0S compone...

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Bibliographic Details
Published in:Physical review. D 2021-07, Vol.104 (1), p.1
Main Author: Ablikim, M
Format: Article
Language:English
Subjects:
Amplitudes
Decay
Luminosity
Uncertainty
Online Access:Get full text
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Summary:Based on an e+e− collision data sample corresponding to an integrated luminosity of 2.93 fb − 1 collected with the BESIII detector at √s = 3.773 GeV , the first amplitude analysis of the singly Cabibbo-suppressed decay D+ → K+K0Sπ0 is performed. From the amplitude analysis, the K*(892) + K0S component is found to be dominant with a fraction of (57.1 ± 2.6 ± 4.2) % , where the first uncertainty is statistical and the second systematic. In combination with the absolute branching fraction B(D+ → K+K0Sπ0) measured by BESIII, we obtain B(D+ → K* (892) + K0S) = (8.69 ± 0.40 ± 0.64 ± 0.51) × 10−3, where the third uncertainty is due to the branching fraction B(D+ → K+K0Sπ0). The precision of this result is significantly improved compared to the previous measurement. This result also differs from most of theoretical predictions by about 4 σ , which may help to improve the understanding of the dynamics behind.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.104.012006