Search for the decay B+ -> Kbar*0(892) K+

TL;DR

This paper reports a search for the rare decay B+ -> Kbar*0(892) K+ using data from the BaBar detector, setting an upper limit on its branching fraction due to limited signal evidence.

Contribution

First search for the decay B+ -> Kbar*0(892) K+ using a large dataset, establishing an upper limit on its branching fraction at 90% confidence level.

Findings

Upper limit on BF(B+ -> Kbar*0(892) K+) is 1.1 x 10^-6.

Signal yield observed is 25 +/- 13 (stat) +/- 7 (syst).

No significant evidence for the decay was found.

Abstract

We report on a search for the process B+ -> Kbar*0(892) K+ using 232 10^6 Upsilon(4S) -> BBbar decays collected with the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. From a signal yield of 25 +/- 13 [stat] +/- 7 [syst] B+ -> Kbar*0(892) (-> K- pi+) K+ events, we place an upper limit on the branching fraction BF(B+ -> Kbar*0(892) K+) of 1.1 10^-6, at the 90% confidence level.