Observation of the Decay B+ --> K+K-pi+

TL;DR

This paper reports the first observation of the charmless decay B+ --> K+K-pi+ with a significant signal, measuring its branching fraction and analyzing the decay structure, but finds no evidence of direct CP violation.

Contribution

First observation of the B+ --> K+K-pi+ decay, with measurement of its branching fraction and decay dynamics using BABAR data.

Findings

Branching fraction BF = (5.0 ± 0.7) x 10^-6

Significant signal with 9.6 sigma significance

No evidence of direct CP asymmetry

Abstract

We report the observation of charmless hadronic decays of charged B mesons to the final state K+K-pi+. Using a data sample of 347.5 fb^-1 collected at the Y(4S) resonance with the BABAR detector, we observe 429+/-43 signal events with a significance of 9.6 sigma. We measure the inclusive branching fraction BF(B+ --> K+K-pi+) = [5.0+/-0.5(stat)+/-0.5(syst)]x10^-6. Inspection of the Dalitz plot of signal candidates shows a broad structure peaking near 1.5 GeV/c^2 in the K+K- invariant mass distribution. We find the direct CP asymmetry to be consistent with zero.