In this contribution, I will give a brief overview of the most common methodologies currently used to extract collinear distributions from experimental data. I will mainly focus on unpolarised parton distribution functions (PDFs), touching upon perturbative ingredients, parameterisations, and data sets. I will also mention recent developments in longitudinally polarised (helicity) PDFs and, if...
Generalized Parton Distributions (GPDs) are fundamental quantum correlation functions of quarks and gluons (collectively referred to as partons) inside hadrons and encode rich information that can unravel many aspects of the confined hadron structure, such as quark and gluon tomography, as well as emergent hadronic properties, including the mechanical properties and spin and mass...
I will present the progress of the Hadstruc collaboration on elucidating the 3D structure of the proton with generalized parton distributions (GPDs) from the pseudo-distribution approach on the lattice. I will particularly devote attention to the uncertainty propagation in the inverse problem faced by concurring approaches on the lattice, and the various lattice systematic uncertainties.
Correlating the transverse spatial distribution of a parton to its longitudinal momentum, Generalized Parton Distributions (GPDs) provide a partonic structure description of a hadron beyond one dimension, and give the possibility to unveil interesting details regarding various properties of the hadron. The GPD program at COMPASS experiment utilized polarized muon beams at 160 GeV on the...
We will present recent results from the COMPASS collaboration on hard exclusive muoproduction of mesons using 160 GeV polarized beams scattering off a liquid hydrogen target. The data cover a unique kinematic regime in the intermediate Bjorken-$x$ domain and moderate $Q^2$, providing new constraints on the nucleon’s generalized parton structure. The measurements include cross-section of...
It is a well established fact the connection between the unpolarized GPDs and the energy-momentum tensor. In fact, these GPDs provide access to the gravitational form factors and, consequently, to the trace of the energy-momentum tensor and its anomaly. With this talk, we will show new perturbative results regarding the matrix element of the vector current for on-shell gluons and establish...
We present the first next-to-leading order (NLO) predictions for the associated production of two pairs of heavy quarks through single-parton scattering (SPS) in collinear factorisation in proton-proton collisions at the LHC and photoproduction at the EIC. At the LHC, this process competes with double parton scattering (DPS) contributions to the same final state. A precise calculation of the...
Jefferson Lab's Continuous Electron Beam Accelerator Facility (CEBAF) continues to be a global hub for nuclear physics research, with a very strong and specific focus on hadron physics. This presentation will highlight selected key achievements from the 12 GeV CEBAF program, which provides a unique window into the fundamental structure of matter.
Looking to the future, I will outline the...
