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Loop Amplitudes from Precision Networks

Evaluating loop amplitudes is a time-consuming part of LHC event generation. For diphoton production with jets we show that simple, Bayesian networks can learn such amplitudes and model their uncertainties reliably. A boosted training of the Bayesian network further improves the uncertainty estimate and the network precision in critical phase space regions. In general, boosted network training of Bayesian networks allows us to move between ﬁt-like and interpolation-like regimes of network training.