QCD Evolution 2026

Session

Session B2

14 May 2026, 16:00

El Escorial

31. Computation of NLO evolution equations of GPDs in the lightcone gauge

Oskar Grocholski (IRFU/CEA, France)

14/05/2026, 16:00

We present our ongoing calculation of the next-to-leading order evolution equations for Generalized Parton Distributions (GPDs) in the flavour-non-singlet sector. We discuss the advantages and challenges associated with the use of the lightcone gauge. We show how the calculation can be automated using a set of analytically computable master integrals. The (spurious) rapidity divergences appear...

38. Constraining QCD energy-momentum tensor via dispersion relations

Victor Martinez Fernandez (IRFU/CEA (France) and CFNS (USA))

14/05/2026, 16:20

Quantum Chromodynamics (QCD) is the theoretical framework to study hadrons by means of their fundamental degrees of freedom, i.e. quarks and gluons, collectively referred to as partons. QCD defines many types of distributions describing a given hadron in terms of partons and, for the purposes of this talk, we are interested in the so-called generalized parton distributions (GPDs). These ones...

11. Unpolarized twist-two GPDs and the role of different IR regulators

Ignacio Castelli (Temple University)

14/05/2026, 16:40

We present a one-loop perturbative study of unpolarized twist-two generalized parton distributions (GPDs) of quarks for external on-shell gluon states. A finite quark mass m is kept throughout the calculation and serves as an infrared regulator, allowing us to study the collinear limit of the GPDs. We also analyze this limit using dimensional regularization to regulate infrared divergences,...

15. A Finite Element Method Analysis of Shadow Ambiguities in Generalized Parton Distributions

Marija Čuić (Irfu, CEA, Université Paris-Saclay/Aidas)

14/05/2026, 17:00

Generalized Parton Distributions (GPDs) and the exclusive processes that probe them present an important insight into hadronic structure. However, extracting GPDs from experimental data constitutes a challenging inverse problem. In this work we revisit the Finite Elements Method (FEM) to study GPDs via their double distribution (DD) representation, focusing on the Radon transform that connects...