Search for the Process e⁺e⁻ → D^*(2007)⁰ with the CMD-3 Detector

Searches for the process of electron–positron (e⁺e⁻) annihilation to the D^*(2007)⁰ meson were performed by means of the CMD-3 detector at the VEPP-2000 e⁺e⁻ collider. In the data analysis, use was made of two dominant modes of D^*0-meson decay to D⁰π⁰ and D⁰γ, where D⁰ was reconstructed in the K^±π^∓π⁺π⁻ channel. By employing a 3.7 pb^-1 data sample accumulated at the c.m. energy of E_c.m.=2006.62 MeV, an upper bound of B(D^*0 → e⁺e⁻) < 1.7 × 10⁻⁶ on the decay branching ratio was obtained at a 90% confidence level.