Radiative transitions of heavy quarkonium states

Understand

We study radiative decays of heavy $Q{\bar Q}$ states, both for $Q=c$ and $Q=b$, using an effective Lagrangian approach which exploits spin symmetry for such states.

• We use existing data on radiative quarkonium transitions to predict some unmeasured decay rates.
• We also discuss how these modes can be useful to understand the structure of X(3872).