From Bethe–Salpeter Wave functions to Generalised Parton Distributions

Abstract : We review recent works on the modelling of generalised parton distributions within the Dyson-Schwinger formalism. We highlight how covariant computations, using the impulse approximation, allows one to fulfil most of the theoretical constraints of the GPDs. Specific attention is brought to chiral properties and especially the so-called soft pion theorem, and its link with the Axial-Vector Ward-Takahashi identity. The limitation of the impulse approximation are also explained. Beyond impulse approximation computations are reviewed in the forward case. Finally, we stress the advantages of the overlap of lightcone wave functions, and possible ways to construct covariant GPD models within this framework, in a two-body approximation.
Type de document :
Article dans une revue
Few-Body Systems, Springer Verlag, 2016, 57 (9), pp.729 - 772. 〈10.1007/s00601-016-1119-8〉
Liste complète des métadonnées

https://hal-cea.archives-ouvertes.fr/cea-01505246
Contributeur : Valerie Poyeton <>
Soumis le : mardi 11 avril 2017 - 10:38:37
Dernière modification le : jeudi 15 mars 2018 - 15:06:23

Lien texte intégral

Identifiants

Citation

C. Mezrag, H. Moutarde, J. Rodríguez-Quintero. From Bethe–Salpeter Wave functions to Generalised Parton Distributions. Few-Body Systems, Springer Verlag, 2016, 57 (9), pp.729 - 772. 〈10.1007/s00601-016-1119-8〉. 〈cea-01505246〉

Partager

Métriques

Consultations de la notice

33