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We simulate the hadroproduction of a t anti-t pair in association with twoisolated hard photons at 13 TeV LHC using the PowHel package. We use thegenerated events, stored according to the Les-Houches event format, to makepredictions for differential distributions formally at the next-to-leadingorder (NLO) accuracy. We present predictions at the hadron level employing thecone-type isolation of the photons used by experiments. We also compare thekinematic distributions to the same distributions obtained in the t anti-t Hfinal state when the Higgs-boson decays into a photon pair, to which theprocess discussed here is an irreducible background.

Hadroproduction of t anti-t pair with two isolated photons with PowHel