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Updated branching ratios and $C P$ asymmetries in $D \to P V$ decays

Hui Zheng ¹, Jia-Rui Dong ¹, and Si-Hong Zhou ^1,2,*

¹School of Physical Science and Technology, Inner Mongolia Key Laboratory of Microscale Physics and Atomic Manufacturing, Inner Mongolia University, Hohhot 010021, China
²Center for Quantum Physics and Technologies, Inner Mongolia University, Hohhot 010021, China

^*Contact author: shzhou@imu.edu.cn

Phys. Rev. D 113, 036004 – Published 2 February, 2026

DOI: https://doi.org/10.1103/h4cg-8jp4

Abstract

Motivated by extensive new high-precision experimental data, we present an updated analysis of the two-body charm decays $D \to P V$ (with $P = π, K, η^{(')}$ and $V = ρ, K^{*}, ω, ϕ$ ) within the factorization-assisted topological-amplitude (FAT) approach. In the framework, flavor SU(3) symmetry breaking effect is incorporated into the topological amplitudes, allowing the nonfactorizable contributions from topological diagrams to be expressed as a minimal set of universal parameters determined through a global fit to experimental data. Thanks to the sufficient data with high precision, we are now able to quantify the nonfactorizable contribution of so-called “factorization” $T$ diagram, which is essential for explaining the observed branching ratios. The parameters for the $C$ , $E$ , and $A$ diagrams are also updated with significant improved precision, and notably, the resulting strong phases differ substantially from those in the earlier FAT analysis. We find that the $C$ topological amplitude features substantial nonfactorizable effects in the charm sector. These refined parameters enable predictions of significantly improved accuracy, yielding branching ratios in good agreement with current data and the latest results in topological diagram approach, and the predicted direct $C P$ asymmetries differ distinctly form previous FAT results due to updated strong phases. In several modes, the $C P$ asymmetries are predicted to reach $O (10^{- 3})$ , thereby making them promising observables for future high-precision experiments at STCF, BES III, LHCb, and Belle II. Predictions for unobserved decay modes, especially those with branching fractions of order $10^{- 4} \sim 10^{- 3}$ , are also provided for forthcoming experimental tests.

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Phys. Rev. D 113, 036004– Published 2 February, 2026

Vol. 113, Iss. 3 — 1 February 2026

Received 14 November 2025
Accepted 15 January 2026

DOI: https://doi.org/10.1103/h4cg-8jp4

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Updated branching ratios and $C P$ asymmetries in $D \to P V$ decays

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Updated branching ratios and CP asymmetries in D→PV decays

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References (51)

Updated branching ratios and $C P$ asymmetries in $D \to P V$ decays