Radiative transitions from Upsilon(5S) to molecular bottomonium

Understand

The heavy quark spin symmetry implies that in addition to the recently observed Z(10610) and Z(10650) molecular resonances with $I^G=1^+$ there should exist two or four molecular bottomonium-like states with $I^G=1^-$.

• Properties of these G-odd states are considered, including their production in the radiative transitions from Upsilon(5S), by applying the same symmetry to the Upsilon(5S) resonance and the transition amplitudes.
• The considered radiative processes can provide a realistic option for observing the yet hypothetical states.