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[PWGEM] Add MC task for photon efficiency and purity studies - #18658
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Add photon-mc-task, which fills the histograms needed to derive photon acceptance, efficiency and purity for PCM and EMCal in MC, each vs pT and centrality or FT0C multiplicity. For each selected collision, it fills: - generated true photons within the configurable eta range - generated photons in detector acceptance (EMCal/DCal geometry incl. the PHOS gap for EMCal, the generator eta range for PCM) - reconstructed candidates passing the photon cuts - candidates validated as true photons, using the common MC mother of the V0 legs for PCM and the leading MC contribution for EMCal PCM, EMCal and combined PCM+EMCal running are selected by process switches.
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Add photon-mc-task, which fills the histograms needed to derive photon acceptance, efficiency and purity for PCM and EMCal in MC, each vs pT and centrality or FT0C multiplicity.
For each selected collision, it fills:
PCM, EMCal and combined PCM+EMCal running are selected by process switches.