Refine
Language
- English (92)
Has Fulltext
- yes (92)
Is part of the Bibliography
- no (92)
Keywords
- e +-e − Experiments (8)
- Branching fraction (7)
- BESIII (6)
- Particle and Resonance Production (5)
- Lepton colliders (4)
- Charm Physics (3)
- Charmed mesons (3)
- Electroweak interaction (3)
- Quarkonium (3)
- Spectroscopy (3)
Institute
- Physik (92)
Using 2.93 fb−1 of e+e− collision data collected with the BESIII detector at the center-of-mass energy 3.773 GeV, we perform the first amplitude analysis of the decay D+ → π+π0π0 and determine the relative magnitudes and phases of different intermediate processes. The absolute branching fraction of D+ → π+π0π0 is measured to be (2.888 ± 0.058stat. ± 0.069syst.)%. The dominant intermediate processes are D+ → a1(1260)+(→ ρ+π0) and D+ → *0ρ+, with branching fractions of (8.66 ± 1.04stat. ± 1.39syst.) × 10−3 and (9.70 ± 0.81stat. ± 0.53syst.) × 10−3, respectively.