Conveners
Session 1: Nucleon and pion structure: TMD PDFs
- Lorenzo Rossi (University of Milan & INFN)
- Bakur Parsamyan (AANL, Turin section of INFN and CERN)
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Dr Bakur Parsamyan (AANL, Turin section of INFN and CERN)21/05/2026, 14:30
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Valentin Moos (NYCU)21/05/2026, 14:40
We present an extraction for the unpolarised transverse momentum dependent (TMD) parton distribution functions (PDFs) for the quarks in the pion from measurements of the Drell-Yan process.
The results are obtained from a fit of the non-perturbative part of the TMDPDFs in the framework of TMD factorisation
and rely on the non-perturbative input for the collinear PDFs.As the data is...
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Mr Lorenzo Rossi (University of Milan & INFN)21/05/2026, 15:10
In this talk, we extend the study of low-invariant-mass Drell–Yan production over the full transverse-momentum spectrum, combining transverse-momentum resummation at small $q_T$ with fixed-order perturbative calculations at large $q_T$, together with a phenomenological description of non-perturbative effects.
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We first consider proton–proton scattering as a benchmark to validate the approach.... -
Carlo Flore (Università di Cagliari & INFN)21/05/2026, 15:40
In this talk, we present new results for double quarkonium production in (un)polarized hadronic collisions at fixed-target experiments. Our approach incorporates the transverse momentum dependent factorization in combination with the Color-Singlet Model. We present new analytical expressions for the angular structure of the cross section for the $q \bar q$-induced channel, highlighting its...
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Patrick Barry (Argonne National Lab)21/05/2026, 16:30
The pion and kaon are the pseudo-Goldstone bosons associated with chiral symmetry breaking as well as the lightest hadrons made up of quarks and gluons. Studying their structures allows us to understand more deeply the dynamics of QCD and emergent phenomena. Experimentally, the meson-induced Drell-Yan process provides sensitivity for the valence distributions at large momentum fraction, while...
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Aurore Courtoy21/05/2026, 17:00
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...
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Mr Lorenzo Rossi (University of Milan & INFN)