Dalitz-plot Analysis of B0 --> D0bar pi+ pi-
The BABAR Collaboration, P. del Amo Sanchez, et al.
TL;DR
This paper presents a Dalitz-plot analysis of B0 decay to D0bar pi+ pi-, identifying various intermediate resonances and measuring their branching fractions using a large data sample from the BaBar detector.
Contribution
It provides the first detailed Dalitz-plot analysis of this decay mode, identifying multiple resonant and nonresonant contributions and measuring their branching fractions.
Findings
Identified intermediate resonances D*_2(2460)-, D*_0(2400)-, rho(770)0, f_2(1270)
Measured branching fractions of decay components
Detected a pi+ pi- S-wave and nonresonant contributions
Abstract
We report preliminary results from a study of the decay B0 --> D0bar pi+ pi- using a data sample of 470.9 +/- 2.8 million BBbar events collected with the BaBar detector at the Y(4S) resonance. Using the Dalitz-plot analysis technique, we find contributions from the intermediate resonances D*_2(2460)-, D*_0(2400)-, rho(770)0 and f_2(1270) as well as a pi+ pi- S-wave term, a D0bar pi- nonresonant S-wave term and a virtual D*(2010)- amplitude. We measure the branching fractions of the contributing decays.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · Nuclear physics research studies