$B^{\ast}$ ${\to}$ $\bar{D}D$ decays with perturbative QCD approach

TL;DR

This paper investigates nonleptonic two-body $B^{*}$ decays into $ar{D}D$ pairs using perturbative QCD, predicting measurable branching ratios at current and future collider experiments.

Contribution

It applies the perturbative QCD factorization approach to $B^{*}$ decays, providing predictions for branching ratios that guide experimental searches.

Findings

Branching ratios for certain $B^{*}$ decays are estimated to be greater than 10^{-9}.

Some decay modes could be observed at LHC and SuperKEKB.

The study offers theoretical predictions for rare $B^{*}$ decay processes.

Abstract

The nonleptonic two-body $B^{\ast}$ ${\to}$ $\bar{D}D$ weak decays are studied phenomenologically with the perturbative QCD factorization approach. It is found that the $B_{s}^{{\ast}0}$ ${\to}$ $D_{s}^{-}D_{s}^{+}$, $B_{d}^{{\ast}0}$ ${\to}$ $D_{d}^{-}D_{s}^{+}$, and $B_{u}^{{\ast}+}$ ${\to}$ $\bar{D}_{u}^{0}D_{s}^{+}$ decays have branching ratios ${\gtrsim}$ $10^{-9}$, and might be promisingly measurable at the running LHC and forthcoming SuperKEKB experiments in the future.