We study the difference between
E(4260)
and the data for
π
+
π
-
J/ψ
We compare the difference to
D*D*
open-charm-pair production.
data from BaBar
Phys. Rev. Lett. 95, 142001 (2005)
and
Phys. Rev. D79, 092001 (2009)
figure from arXiv:1005.1010