Present state of the knowledge about charmionium energetical states
(i.e. mesons which is built from c quark and c antiquark)
and trasitions between these states. Distances between energetic levels according
to difference of the masses - for example J/? meson's mass in (1S)
state is m=3097 MeV and in (2S) state - m=3686 MeV.
Marking g* means decays with presence of
virtual photons, including decays to e+e- and
µ+µ-.
Uncwrtiaun states and transitions are marked with dashed lines
Source: Particles and fields, Phys. Rev. D., Vol. 66, No 1-I,
2002, str. 719 Table of energy