Observation of B+ -> Phi Phi K+ and evidence for B0 -> Phi Phi K0 below Eta_C threshold

TL;DR

This paper reports measurements of specific B meson decay modes involving Phi Phi K final states, providing branching fractions with statistical and systematic uncertainties, based on a large data sample from the BABAR experiment.

Contribution

First measurement of B+ -> Phi Phi K+ and B0 -> Phi Phi K0 branching fractions below the Eta_C threshold using BABAR data.

Findings

Br(B+ -> Phi Phi K+) = (7.5 +/- 1.0 +/- 0.7) x 10^-6

Br(B0 -> Phi Phi K0) = (4.1 +1.7/-1.4 +/- 0.4) x 10^-6

Results are consistent with previous limits and theoretical expectations.

Abstract

We report measurements of the decays B+ -> Phi Phi K+ and B0 -> hi Phi K0 using a sample of 231 million BBbar pairs collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. The branching fractions are measured to be Br(B+ -> Phi Phi K+) = (7.5 +/- 1.0 stat. +/- 0.7 syst.) * 10^-6 and Br(B0 -> Phi Phi K0) = (4.1 +1.7/-1.4 stat. +/- 0.4 syst.) * 10^-6 for a Phi Phi invariant mass below 2.85 GeV/c2.