Dalitz Plot Analysis of D0-->K0bar K+ K-

TL;DR

This paper presents a detailed Dalitz plot analysis of D0 decays to K0bar K+ K-, measuring branching ratios, resonant contributions, and CP asymmetries using data from the BaBar detector at SLAC.

Contribution

It provides the first detailed Dalitz plot analysis of D0-->K0bar K+ K- decays, including resonance fractions, phases, and CP asymmetry search, based on a large data sample.

Findings

Branching ratio BR = (15.8 ± 0.1 (stat) ± 0.5 (syst)) x 10^-2

Extraction of a0(980)-->K Kbar contribution with minimal background

No significant CP asymmetry observed in the decay

Abstract

A Dalitz plot analysis of approximately 12500 D0 events reconstructed in the hadronic decay D0-->K0bar K+ K- is presented. This analysis is based on a data sample of 91.5 fb-1 collected with the BaBar detector at the PEP-II asymmetric-energy e+ e- storage rings at SLAC running at center-of-mass energies on and 40 MeV below the Y4S resonance. The events are selected from e+ e- --> c cbar annihilations using the decay D*+ --> D0 pi+. The following ratio of branching fractions has been obtained: BR = Gamma(D0-->K0bar K+ K-)/Gamma(D0-->K0bar pi+ pi-) = (15.8+/-0.1(stat.)+/-0.5(syst.)x 10-2 Estimates of fractions and phases for resonant and non-resonant contributions to the Dalitz plot are also presented. The a0(980)-->K Kbar projection has been extracted with little background. A search for CP asymmetries on the Dalitz plot has been performed.