Speaker
Description
In light of recent progress on both the experimental and lattice-QCD sides, our understanding of the pion’s structure has evolved. Phenomenological, or global, QCD analyses play a crucial role in establishing a bridge between experimental data, theoretical predictions, and lattice-QCD studies. I will present recent efforts in the determination of the distribution of partons in the pion, with an emphasis on uncertainty quantification. The Fantômas project aims to explore the role of parametric forms for the distribution of quarks and gluons in the final uncertainty that results from the global analysis. To achieve this objective, the Fantômas project employs Bézier curves for generating diverse functional forms for the PDFs. The selection process for the final set of solutions hence involves sampling over the parametrization space, allowing for a comprehensive exploration of uncertainties. I will discuss the phenomenological interpretation of the FantoPDF uncertainties.