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Shadow generalized parton distributions: a practical approach to the deconvolution problem of DVCS
by V. Bertone, H. Dutrieux, C. Mezrag, H. Moutarde, P. Sznajder
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Submission summary
| Authors (as registered SciPost users): | Hervé Dutrieux |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2107.11312v1 (pdf) |
| Date accepted: | 2022-03-22 |
| Date submitted: | 2021-07-26 10:55 |
| Submitted by: | Dutrieux, Hervé |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
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| Approaches: | Experimental, Phenomenological |
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.
Published as SciPost Phys. Proc. 8, 107 (2022)