EKHARA 3.0: an update of the EKHARA Monte Carlo event generator

Understand

The Monte Carlo event generator EKHARA was upgraded during last years.

• The upgrades presented here contain: a) the inclusion of new final states $e^+e^-\to e^+e^-\eta $, $e^+e^-\to e^+e^-\eta'$, $e^+e^-\to e^+e^- \chi_{c_i} $ and $e^+e^-\to e^+e^- \chi_{c_i} (\to J/\psi (\to \mu^+\mu^-)\gamma)$; b) new $\gamma^*-\gamma^*-P$ transition form factors and c) the radiative corrections to the reactions $e^+e^-\to e^+e^-P $.
• For the upgrades a) and b), we present here only the pieces missing in other publications, mostly algorithms used in the phase space generation.
• The radiative corrections are presented here for the first time.