Canonical Charmonium Interpretation for Y(4360) and Y(4660)

TL;DR

This paper analyzes the charmonium state assignments for Y(4360) and Y(4660), evaluating their properties and decay modes to determine their most likely charmonium configurations.

Contribution

It provides a detailed evaluation of Y(4360) and Y(4660) as potential charmonium states, including decay widths and transition rates, and discusses hybrid interpretations.

Findings

Y(4660) fits well as a 5^3S_1 car{c} state.

Y(4360) may be a 3^3D_1 car{c} state or a hybrid.

Experimental tests are proposed to confirm these assignments.

Abstract

In this work, we consider the canonical charmonium assignments for Y(4360) and Y(4660). Y(4660) is good candidate of $\rm 5 ^3S_1$ $c\bar{c}$ state, the possibility of Y(4360) as a $\rm 3 ^3D_1$ $c\bar{c}$ state is studied, and the charmonium hybrid interpretation of Y(4360) can not be excluded completely. We evaluate the $e^{+}e^{-}$ leptonic widths, E1 transitions, M1 transitions and the open flavor strong decays of Y(4360) and Y(4660). Experimental tests for the charmonium assignments are suggested.