18-22 October 2021
Matsue, Shimane Prefecture, Japan
Asia/Tokyo timezone

The deconvolution problem of deeply virtual Compton scattering

18 Oct 2021, 20:00
20m
Room 501 (Kunibiki Messe)

Room 501

Kunibiki Messe

Parallel Session Presentation Form factors and GPDs Form Factors and GPDs

Speaker

Hervé Dutrieux (Irfu, CEA, Université Paris-Saclay)

Description

Generalised parton distributions are instrumental to study both the three-dimensional structure and the energy-momentum tensor of the nucleon, and motivate numerous experimental programmes involving hard exclusive measurements. Based on a next-to-leading order analysis and a careful study of evolution effects, we exhibit non-trivial generalised parton distributions with arbitrarily small imprints on deeply virtual Compton scattering observables. This means that in practice the reconstruction of generalised parton distributions from measurements, known as the deconvolution problem, does not possess a unique solution for this channel. We further discuss the consequences on the extraction of generalised parton distributions from data and advocate for a multi-channel analysis.

Primary author

Hervé Dutrieux (Irfu, CEA, Université Paris-Saclay)

Co-authors

Dr Valerio Bertone (Irfu, CEA) Dr Cédric Mezrag (Irfu, CEA) Dr Hervé Moutarde (Irfu, CEA) Dr Pawel Sznajder (National Centre for Nuclear Research (NCBJ), Warsaw, Poland)

Presentation Materials

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