Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D⁺→ K⁺π⁰, D⁺→ K⁺η and D⁺→ K⁺η^′

2025/06/18 by BESIII Collaboration, M. Ablikim, М. Н. Ачасов +782 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2506.15533

openalex publication_date 2025/06/18 · openalex created_date 2025/10/19 · openalex updated_date 2026/07/28

Abstract

Using 20.3 \rm fb^-1 of e⁺e^- collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we present the measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D⁺→ K⁺π⁰, D⁺→ K⁺η and D⁺ → K⁺ η^′ with the double-tag method, with significantly improved precision compared to the previous measurements. The statistical significance of each signal decay exceeds 10σ. The branching fractions are determined to be \mathcal B(D⁺→ K⁺ π⁰) = (1.45 ± 0.06 ± 0.08)× 10^-4, \mathcal B(D⁺→ K⁺ η) = (1.17 ± 0.10 ± 0.03)× 10^-4 and \mathcal B(D⁺→ K⁺ η^′) = (1.88 ± 0.15 ± 0.11)× 10^-4, where the first uncertainties are statistical and the second systematic. The branching fractions of D⁺→ K⁺η and D⁺ → K⁺ η^′ are consistent with the world average values. The reported branching fraction of D⁺→ K⁺π⁰ deviates with the world average value by 3σ.

Citations

• Anatomy of Non-Leptonic Two-Body Decays of Charmed Mesons into Final States with η'
• Review of Particle Physics
• Coherent Exclusive Exponentiation for Precision Monte Carlo Calculations of Fermion Pair Production / Precision Predictions for (Un)stable W+W- Pairs
• The precision Monte Carlo event generator for two-fermion final states in collisions

Cited by

• CP Violation in Charmed Meson Decays into Final States with η'

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