Work

Shadow generalized parton distributions: a practical approach to the deconvolution problem of DVCS

Year: 2021

Type: preprint

Abstract: Deeply virtual Compton scattering (DVCS) attracts a lot of interest due to its sensitivity to generalized parton distributions (GPDs) which provide a rich access to the partonic structure of hadrons. However, the practical extraction of GPDs for this channel requires a deconvolution procedure, whose feasibility has been disputed. We provide a practical approach to this problem based on a next-to-leading order analysis and a careful study of evolution effects, by exhibiting shadow GPDs with arbitrarily small imprints on DVCS observables at current and future experimental facilities. This shows that DVCS alone will not allow for a model independent extraction of GPDs and a multi-channel analysis is required for this purpose.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2107.11312

Authors: Bertone, V., Dutrieux, H., Mezrag, C., Moutarde, H., Sznajder, P.

Institution: Institut de Recherche sur les Lois Fondamentales de l'Univers

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W4287215699

Cites:

Cited by: 1

Related to: 10