Speaker
Description
We present the recent developments in simulations of ultra-peripheral collisions with the Pythia 8 Monte Carlo event generator. We first review the status of recent comparisons and tuning efforts to HERA photoproduction data which provide the baseline of photon-nucleon interactions. Then we present the vector-meson-dominance (VMD) based approach to model interactions between a real photon and a nucleus target applying the Angantyr model which provides a framework for simulate heavy-ion collisions in Pythia. We compare the simulations to recent UPC data from LHC experiments, including dijets, charged-particles and heavy-flavour mesons. In addition, we present predictions for multiplicity distributions in photo-nuclear collisions at the EIC accounting for the constraints form the UPCs.
