A plausible explanation of $\Upsilon(10860)$

Abstract

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