Krzysztof Graczyk

Neural Network vs. Loop Predictions of TPE effect in Elastic ep Scattering

A review of my latest paper (soon on arXive) will be given. The Two-Photon Exchange effect in elastic ep scattering is under investigation. In this talk a comparison of the results obtained from the global Bayesian analysis of the scattering data and loop calculations will be given. The data analysis was done with the help Bayesian framework for artificial feed forward neural networks. More then 40 models were considered, the best one was indicated by a probabilistic measure. The loop corrections were obtained assuming a nucleon and Delta(1232) resonance as hadronic intermediate states in the TPE box diagrams. Several phenomenological scenarios will be discussed.