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15-16 janvier 2015
Institut Henri Poincaré
Fuseau horaire Europe/Paris

Describing hadron structure using Dyson-Schwinger equations

15 janv. 2015 à 11:05
14m
Chair: Jean-Philippe Lansberg, Amphi Hermite (Institut Henri Poincaré)

Chair: Jean-Philippe Lansberg, Amphi Hermite

Institut Henri Poincaré

11, rue Pierre et Marie Curie 75005 Paris

Orateur

M. Cédric Mezrag (IRFU/SPhN)

Description

If at high energy QCD can be described using perturbation theory due to asymptotic freedom, when going at low energy the fundamental degrees of freedom of the theory, quarks are gluons, are bounded inside hadrons. The hadron structure in terms of partons has been studied since the 1960s. Today several objects have been both theoretically and experimentally studied, like for instance Generalized Parton Distributions (GPDs) which contains a three dimensional information about the parton structure of hadrons. However, it is still not possible to compute such objects directly from QCD first principles. As a first step toward this ideal goal, we have developed here a model for the pion GPD based on the Dyson-Schwynger equations, which are a way to compute QCD non pertubative Green functions. We have successfully compared our model with available experimental data of pion form factor and pion Parton Distribution Function (PDF), and managed to sketch the partonic 3D structure of the pion.

Auteur principal

M. Cédric Mezrag (IRFU/SPhN)

Documents de présentation

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