Study of the $\bar{B}_{q}^{\ast}$ ${\to}$ $DM$ decays with perturbative QCD approach

TL;DR

This paper investigates the weak decay processes of $ar{B}_{q}^{ ext{*}}$ mesons into D mesons and light mesons using perturbative QCD, predicting measurable branching ratios for certain decay channels at current colliders.

Contribution

It provides the first perturbative QCD calculations of $ar{B}_{q}^{ ext{*}}$ ${ o}$ $DP$, $DV$ decay rates, highlighting promising channels for experimental observation.

Findings

Branching ratios for $ar{B}_{q}^{ ext{*}}$ ${ o}$ $D_{q}{ ho}^{-}$ can reach $10^{-9}$ or higher.

Color-allowed decay modes are potentially measurable at LHC and SuperKEKB.

Predictions aid future experimental searches for $ar{B}_{q}^{ ext{*}}$ decays.

Abstract

The $\bar{B}_{q}^{\ast}$ ${\to}$ $DP$, $DV$ weak decays are studied with the perturbative QCD approach, where $q$ $=$ $u$, $d$ and $s$; $P$ and $V$ denote the ground $SU(3)$ pseudoscalar and vector meson nonet. It is found that the branching ratios for the color-allowed $\bar{B}_{q}^{\ast}$ ${\to}$ $D_{q}{\rho}^{-}$ decays can reach up to $10^{-9}$ or more, and should be promisingly measurable at the running LHC and forthcoming SuperKEKB experiments in the near future.