Artificial neural network modelling of generalised parton distributions

We discuss the use of machine learning techniques in effectively nonparametric modelling of generalised parton distributions (GPDs) in view of their future extraction from experimental data. Current parameterisations of GPDs suffer from model dependency that lessens their impact on phenomenology and brings unknown systematics to the estimation of quantities like Mellin moments. The new strategy presented in this study allows to describe GPDs in a way fulfilling theory-driven constraints, keeping model dependency to a minimum. Getting a better grip on the control of systematic effects, our work will help the GPD phenomenology to achieve its maturity in the precision era commenced by the new generation of experiments.

Automated summary

This study discusses the use of machine learning techniques in nonparametric modelling of generalised parton distributions (GPDs) and presents a new strategy to reduce model dependency. The work helps in controlling systematic effects and improving the precision in GPD phenomenology.