Combined analysis of the singly-Cabbibo-suppressed decays of $D^{0} \to VP$

TL;DR

This paper performs a combined analysis of six singly Cabibbo-suppressed $D^0 o VP$ decays, revealing the significant role of internal conversion processes alongside direct emission in these decay mechanisms.

Contribution

It introduces a combined analysis approach that explicitly highlights the comparable contributions of internal conversion processes in $D^0 o VP$ decays.

Findings

Internal conversion processes contribute at the same order as direct emission.

Combined analysis clarifies the decay mechanisms involved.

Highlights the importance of IC processes in charm meson decays.

Abstract

We investigate six singly Cabibbo-suppressed decay channels in $D^0\to VP$ ( $V$ and $P$ stand for the ground state vector and pseudoscalar mesons, respectively), i.e. $D^{0}\to \rho^{+}\pi^{-}$, $\rho^{-}\pi^{+}$, $K^{*+}K^{-}$, $K^{*-}K^{+}$, $K^{*0}\bar{K}^{0}$, and $\bar{K}^{*0}K^{0}$. These decay channels share the similar transition mechanisms involving only the direct emission (DE) and internal conversion (IC) processes. We show that a combined analysis of these channels can explicitly highlight the role played by the IC processes which contribute to the amplitudes at the same order of magnitude as the DE processes.