A Dalitz plot analysis of approximately 12 500 D0 events reconstructed in the hadronic decay D0→K̅ 0K+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 Υ(4S) resonance. The events are selected from e+e-→cc̅ annihilations using the decay D*+→D0π+. The following ratio of branching fractions has been obtained: BR=Γ(D0→K̅ 0K+K-)/Γ(D0→K̅ 0π+π-)=(15.8±0.1(stat.)±0.5(syst.))×10-2. Estimates of fractions and phases for resonant and nonresonant contributions to the Dalitz plot are also presented. The a0(980)→K̅ K projection has been extracted with little background. A search for CP asymmetries on the Dalitz plot has been performed.
Dalitz plot analysis of D0→K̅ 0K+K-
SIMI, GABRIELE;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;
2005
Abstract
A Dalitz plot analysis of approximately 12 500 D0 events reconstructed in the hadronic decay D0→K̅ 0K+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 Υ(4S) resonance. The events are selected from e+e-→cc̅ annihilations using the decay D*+→D0π+. The following ratio of branching fractions has been obtained: BR=Γ(D0→K̅ 0K+K-)/Γ(D0→K̅ 0π+π-)=(15.8±0.1(stat.)±0.5(syst.))×10-2. Estimates of fractions and phases for resonant and nonresonant contributions to the Dalitz plot are also presented. The a0(980)→K̅ K projection has been extracted with little background. A search for CP asymmetries on the Dalitz plot has been performed.Pubblicazioni consigliate
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