The validity of the EPA

Dear Experts,

I am computing the main process e e \rightarrow e \gamma* \gamma* e \rightarrow e \mu+ \mu- e through the subprocess \gamma* \gamma* \rightarrow \mu+ \mu- at an ee collider using the Equivalent Photon Approximation (EPA) (\gamma* is EPA photon). Here, Qmax maximum virtuality of the photon is taken 1.41 GeV. I take into account that the the center of mass energy for ee collider is 1 TeV. To calculate the number of events of the main process, we use the following formula;

N=sigxLint

where sig is the total cross section of the main process and Lint is the integrated luminosity of the ee collider.

On the other hand, since we are using EPA, do we need to use effective luminosity different from Lint? Or does CalcHEP take this into account this situation?

Best Regards,

Murat