Chang, L.Mezrag, CédricMoutarde, HervéRodríguez Quintero, José2020-10-022020-10-022015-01Chang, L., Mezrag, C., Moutarde, H. ... Rodríguez Quintero, J. (2015). DSE inspired model for the pion’s valence dressed-quark GPD. Journal of Physics: Conference Series, 631, 012062. DOI: https://doi.org/10.1088/1742-6596/631/1/0120621742-6588http://hdl.handle.net/10272/18766We sketch here an approach to the computation of genaralised parton distributions (GPDs), based upon a rainbow-ladder (RL) truncation of QCD's Dyson-Schwinger equations and exemplified via the pion's valence dressed-quark GPD, H v π(x,ξ,t). Our analysis focuses on the case of zero skewness, ξ = 0, and underlines that the impulse-approximation used hitherto to define the pion's valence dressed-quark GPD is generally invalid owing to omission of contributions from the gluons which bind dressed-quarks into the pion. A simple correction enables us to identify a practicable improvement to the approximation for H v π(x,0,t), expressed as the Radon transform of a single amplitude. Therewith we obtain results for H v π(x,0,t) and the associated impact-parameter dependent distribution, , which provide a qualitatively sound picture of the pion's dressed-quark structure at an hadronic scale.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/DSEGPDPion's valenceDressed-quarkjournal article10.1088/1742-6596/631/1/012062open access