Physics with leptons and photons at the LHC

We present a phenomenological study of photon--initiated (PI) lepton production at the LHC, as implemented in structure function (SF) approach. provide detailed predictions for multidifferential pair production, and show that impact on observables sensitive to weak mixing angle, ${\mathrm{sin}}^{2}{\ensuremath{\theta}}_{W}$, $W$ boson mass, ${M}_{W}$, well PDFs can be non-negligible, particular given high precision being aimed for. The SF calculation percent level corresponding cross sections, is therefore positioned account LHC requirements. In addition pure $\ensuremath{\gamma}\ensuremath{\gamma}$ channel, we include initial-state $Z$ mixed $\ensuremath{\gamma}/Z+q$ contributions, assess their impact. also consider photon-initiated lepton-lepton scattering, again find approach this process way straightforwardly any fiducial cuts imposed. Finally, publicly available Monte Carlo generator, SFGen, PI scattering within approach, use by community.