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Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2019

Unbiased determination of DVCS Compton Form Factors

Résumé

The extraction of Compton form factors (CFFs) in a global analysis of almost all deeply virtual Compton scattering (DVCS) proton data is presented. The extracted quantities are DVCS sub-amplitudes and the most basic observables which are unambiguously accessible from this process. The parameterizations of CFFs are constructed utilizing the artificial neural network technique allowing for an important reduction of model dependency. The analysis consists of such elements as feasibility studies, training of neural networks with the genetic algorithm and a careful regularization to avoid over-fitting. The propagation of experimental uncertainties to extracted quantities is done with the replica method. The resulting parameterizations of CFFs are used to determine the subtraction constant through dispersion relations. The analysis is done within the PARTONS framework.

Dates et versions

hal-02144172 , version 1 (29-05-2019)

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Citer

H. Moutarde, P. Sznajder, J. Wagner. Unbiased determination of DVCS Compton Form Factors. European Physical Journal C: Particles and Fields, 2019, 79 (7), pp.614. ⟨10.1140/epjc/s10052-019-7117-5⟩. ⟨hal-02144172⟩
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