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

Understand

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.