$\chi_{c1}$ and $\chi_{c2}$ production at $e^+e^-$ colliders

Understand

Direct, resonant production of the charmonium states $\chi_{c1}$ and $\chi_{c2}$ in electron-positron annihilation is investigated.

• Depending on details of the model, a sizeable variation of the prediction for the production cross section is anticipated.
• It is demonstrated that resonant production could be observed under favorable circumstances.