Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-01-18
Phys.Lett. B536 (2002) 34-42
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 Page, 8 figures, one table added
Scientific paper
10.1016/S0370-2693(02)01812-9
We study $D \to \pi\pi$ decays with final state interactions considered in one-particle-exchange method. A clear physical picture for final state interactions based on quark and hadronic level diagrams is presented. A strong phase is introduced for hadronic effective couplings, which is crucial for explaining the experimental data of $D^+\to \pi^+\pi^0$, $D^0\to \pi^+\pi^-$, and $D^0\to \pi^0\pi^0$. Rescattering effects between different $D$ decay channels are usually large. They are important for obtaining correct branching ratios for $D\to \pi\pi$ decays in theoretical calculation.
Ablikim Medina
Du Dong-Sheng
Yang Mao-Zhi
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