Dalitz Plot Analysis of D_s+ -> pi+ pi- pi+
The BABAR Collaboration: B. Aubert, et al
TL;DR
This paper presents a detailed Dalitz plot analysis of approximately 13,000 D_s+ decays to pi+ pi- pi+ using data from the BaBar detector, measuring resonance contributions, phases, and a precise branching ratio.
Contribution
It provides the first high-precision measurement of resonance amplitudes, phases, and the S-wave component in D_s+ decays, using a large data sample and model-independent analysis.
Findings
Measured resonance amplitudes and phases in D_s+ decays.
Determined the ratio of branching fractions with high precision.
Performed a model-independent partial wave analysis of the S-wave.
Abstract
A Dalitz plot analysis of approximately 13,000 Ds+ decays to pi+pi-pi+ has been performed. The analysis uses a 384 fb-1 data sample recorded by the BaBar detector at the PEP-II asymmetric-energy e+e- storage ring running at center of mass energies near 10.6 GeV. Amplitudes and phases of the intermediate resonances which contribute to this final state are measured. A high precision measurement of the ratio of branching fractions is performed: BR(Ds+ -> pi+pi-pi+)/BR(Ds+ -> K+ K- pi+)=0.199 +/- 0.004 +/- 0.009. Using a model-independent partial wave analysis, the amplitude and phase of the S-wave have been measured.
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