A plausible explanation of ${\rm Y}(10860)$

Abstract

We show that a good description of the ${\rm Y}(10860)$ properties, in particular the mass, the $e^{+}{e}^{-}$ leptonic widths and the ${\pi }^{+}{\pi }^{-}{\rm Y}(ns)$$(n=1,2,3)$ production rates, can be obtained under the assumption that ${\rm Y}(10860)$ is a mixing of the conventional ${\rm Y}(5s)$ quark model state with the lowest $P-$ wave hybrid state.

13 pages, 3 tables, 2 figures, keywords: quark; meson; potential