Branching ratios for the decays of Ψ(3770) and ϒ(10580) mesons to a pair of light hadrons

Abstract

The branching ratios for the exclusive decays of the heavy quarkonia Ψ(3770) and ϒ(10580) to a pair of light mesons [π ⁺ π ^-, $K\bar K$, ρ(ω)π, ρ(ω)η, ρ(ω)η’, $K^* \bar K$+c.c, ρ ⁺ ρ ^-, and $K^* \bar K^*$] and the branching ratios for the decays Ψ(3770) → J/Ψ + P(P = π ⁰, η) and ϒ(10580) → ϒ(1S) + P(P = π ⁰,η,η′), which involve a heavy quarkonium in the final state, are calculated with allowance for new data on the width of the D*^±(2010) meson and the mass differences between the charged and neutral beauty mesons (B ^±, on one hand, and B ⁰ and $\bar B^0$, on the other hand). The calculations are based on the model where the Okubo-Zweig-Iizuka rule is dynamically violated owing to the intermediate state $D\bar D (B\bar B)$ in the case of the Ψ(3770) [ϒ(10580)] meson. The inclusive annihilation of Ψ(3770) and ϒ(10580) mesons to light hadrons is discussed.