Study of $B^+ \rightarrow p \overline{n} \pi^0$

TL;DR

This study searches for the decay $B^+ ightarrow p ar{n} \pi^0$ using Belle data, setting an upper limit on its branching fraction due to no significant signal detection.

Contribution

First search for a decay mode involving an anti-neutron with the Belle detector, establishing an upper limit on its branching fraction.

Findings

No significant signal observed.

Upper limit on branching fraction set at $6.1 imes 10^{-6}$.

First search of this decay mode with Belle.

Abstract

We search for the tree-diagram dominated process $B^+ \rightarrow p \overline{n} \pi^0$, using a data sample of $772 \times 10^6~B\overline B$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. This is the first search with the Belle detector for a decay mode including an anti-neutron. No significant signal is observed and an $90\%$ credible upper limit on the branching fraction is set at $6.1\times10^{-6}$.