Search for the Rare Decays B0 -> Ds(*)+ a0(2)-

TL;DR

This study searched for rare B0 meson decays into specific final states involving D_s and a0(2) mesons, finding no evidence and setting upper limits on their branching fractions based on data from the BaBar experiment.

Contribution

First search for these specific B0 decay modes, providing upper limits on their branching fractions and constraining theoretical models of rare B meson decays.

Findings

No evidence for the decays was observed.

Upper limits on branching fractions were established.

Results constrain theoretical predictions of rare B decays.

Abstract

We have searched for the decays $B^0 \rightarrow D_s^{+}a_0^-$, $B^0 \rightarrow D_s^{*+}a_0^-$, $B^0 \rightarrow D_s^{+}a_2^-$ and $B^0 \rightarrow D_s^{*+}a_2^-$ in a sample of about 230 million $\Upsilon(4S) \rightarrow B{\bar B}$ decays collected with the {\sl BaBar} detector at the PEP-II asymmetric-energy $B$-factory at SLAC. We find no evidence for these decays and set upper limits at 90\% C.L. on the branching fractions: ${\cal B}(B^0 \rightarrow D_s^+ a_0^-) < 1.9\times 10^{-5}$, ${\cal B}(B^0 \rightarrow D_s^{*+} a_0^-) < 3.6\times 10^{-5}$, ${\cal B}(B^0 \rightarrow D_s^+ a_2^-) < 1.9 \times 10^{-4}$, and ${\cal B}(B^0 \rightarrow D_s^{*+} a_2^-) < 2.0\times 10^{-4} $.