Apr 8 – 12, 2024
Maison MINATEC, Grenoble, FRANCE
Europe/Paris timezone

Off-Forward parton structure in Ioffe time space

Apr 10, 2024, 12:20 PM
Maison MINATEC, Grenoble, FRANCE

Maison MINATEC, Grenoble, FRANCE

3 Parv. Louis Néel, 38054 Grenoble
Regular parallel talk WG5: Spin and 3D Structure WG5


Savvas Zafeiropoulos (LPC-CNRS)


In this talk I will describe a Lattice QCD calculation of parton structure from off-forward matrix elements. Similar to DVCS cross sections, these matrix elements are convolutions of Generalized Parton Distributions (GPDs), or equivalently Double Distributions (DDs). In our methodology, the computational cost of many different momenta combinations can be ameliorated allowing for a plethera of data, crucial for obtaining accurate 3D pictures of the nucleon. We utilize the Lorentz invariant pseudo-GPD framework to handle the many frames simultaneously. Within this picture and as shown in our data, the well known GPD features of polynomiality naturally arise in Ioffe time space, the Fourier conjugate of the momentum fraction x. We are also able to extract Gravitational Form Factors and other moments of the GPDs.

Primary authors

Joseph Karpie (Jefferson Lab) Savvas Zafeiropoulos (LPC-CNRS)

Presentation materials