Search for B+ -> D+ K0 and B+-> D+ K*0 decays

TL;DR

This study searches for rare B+ meson decays into D+ and K0 or K*0, setting upper limits on their branching fractions due to lack of significant evidence.

Contribution

First search for these specific decay modes, providing upper limits that constrain theoretical models of B meson decays.

Findings

No significant evidence found for the decays.

Upper limits set on branching fractions: <2.9×10^{-6} and <3.0×10^{-6}.

Data sample of 465 million B B̄ pairs used.

Abstract

We report a search for the rare decays $B^+ \to D^+ K^0$ and $B^+ \to D^+ K^{*0}$ in an event sample of approximately 465 million $B\bar B$ pairs collected with the BaBar detector at the PEP-II asymmetric-energy $e^+e^-$ collider at SLAC. We find no significant evidence for either mode and we set 90\% probability upper limits on the branching fractions of $B(B^+ \to D^+ K^0) < 2.9\times 10^{-6}$ and $B(B^+ \to D^+ K^{*0}) < 3.0\times 10^{-6}$.