Study of the ${\Upsilon}(1S)$ ${\to}$ $DP$ decays

TL;DR

This paper investigates rare ${}$ decays of the ${}$ meson into D and pion or kaon final states using perturbative QCD, finding extremely small branching ratios within the standard model.

Contribution

It provides the first theoretical estimates of these decay modes' branching ratios within the standard model using perturbative QCD.

Findings

Branching ratios are about 10^{-18} within the standard model.

Decays are too rare for current experimental detection.

Potential enhancements could make detection feasible.

Abstract

Inspired by the potential prospects of high-luminosity dedicated colliders and the high enthusiasms in searching for new physics in the flavor sector at the intensity frontier, the ${\Upsilon}(1S)$ ${\to}$ $D^{-}{\pi}^{+}$, $\overline{D}^{0}{\pi}^{0}$ and $D_{s}^{-}K^{+}$ weak decays are studied with the perturbative QCD approach. It is found within the standard model that the branching ratios for the concerned processes are tiny, about ${\cal O}(10^{-18})$, and far beyond the detective ability of current experiments unless there exists some significant enhancements from a noval interaction.