Search for the decay $B^+\rightarrow\overline{K}{}^{*0}K^{*+}$ at Belle

TL;DR

This paper reports a search for a rare decay of B+ mesons into specific kaon resonances, using a large dataset, but finds no significant signal and sets an upper limit on the decay's branching fraction.

Contribution

First search for the decay $B^+ ightarrow ar{K}^{*0} K^{*+}$ with a large data sample, establishing an upper limit on its branching fraction.

Findings

No significant signal observed.

Upper limit on branching fraction set at $1.31 imes 10^{-6}$.

Data sample of 772 million B meson pairs used.

Abstract

We report a search for the rare charmless decay $B^+\rightarrow\overline{K}{}^{*0}K^{*+}$ using a data sample of $772\times10^6$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. No statistically significant signal is found and a 90% confidence-level upper limit is set on the decay branching fraction as $ \mathcal{B}(B^+\rightarrow\overline{K}{}^{*0}K^{*+}) <1.31\times 10^{-6}$.