Nonleptonic two-body decays of charmed mesons

TL;DR

This paper investigates nonleptonic decays of charmed mesons into two pseudoscalar or one pseudoscalar and one vector meson, using a generalized factorization approach that includes resonance effects and strong phases, resulting in improved agreement with experimental data.

Contribution

It introduces a generalized factorization method incorporating resonance effects and strong phases to better model charmed meson decays, especially in the annihilation contributions.

Findings

Annihilation contributions are large in both $PP$ and $PV$ modes.

Numerical results align better with experimental data.

Resonance effects significantly impact decay amplitude calculations.

Abstract

Nonleptonic decays of charmed mesons into two pseudoscalar mesons or one pseudoscalar meson and one vector meson are studied on the basis of a generalized factorization method considering the resonance effects in the pole model for the annihilation contributions. Large strong phases between different topological diagrams are considered in this work, simply taking the phase in the coefficients $a_i$. We find that the annihilation-type contributions calculated in the pole model are large in both of the $PP$ and $PV$ modes, which make our numerical results agree with the experimental data better than those previous calculations.