Analysis of the decays ψ′ → J/ψπ + π − and η′c → η c π + π − with the heavy-quark symmetry

Abstract

In this article, we study the decays ψ′ → J/ψπ + π − and η′c → η c π + π − by taking into account the chiral symmetry breaking effects, the final-state interactions and the heavy-quark symmetry. We can confront the predictions of the η′c → η c π + π − decay width and differential decay width with the experimental data in the future, and obtain powerful constraints on the chiral breaking effects and the final-state interactions, and test the heavy-quark symmetry.