Non-factorizable contributions in D⁰→\pi^+\pi^- decay

We have analyzed the D⁰→\pi^+\pi^- decay with \alpha_s corrections in quantum chromodynamic (QCD) factorization and with the soft-gluon corrections in the light cone QCD sum rules. The soft-gluon effects are firstly calculated in the decay channel. The results show that once the factorization contributions, the \alpha_s corrections, and the soft-gluon effects are all considered, we can satisfactorily explain the experimental data in the decay channel.