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In the paper we present results for final state emissions of lepton pairs indecays of heavy intermediate states such as Z boson. Short presentations ofPHOTOS and SANC algorithms and physics assumptions are given. Numericaldistributions of relevance for LHC observables are shown. They are used indiscussions of systematic errors in the predictions of pair emissions asimplemented in the two programs. Suggestions for the future works are given.Present results confirm, that for the precision of 0.3% level, in simulation offinal state the pair emissions can be avoided. For the precision of 0.1-0.2%,the results obtained with the presented programs should be enough. To crossprecision tag of 0.1%, the further work is however required.

Extra lepton pair emission corrections to Drell-Yan processes in PHOTOS and SANC