Abstract
We evaluate the pion and kaon transverse momentum dependent parton distribution functions in the instanton liquid model, a model of the QCD vacuum at low resolution. The relevant transverse momentum distributions (TMDs) are factored into a constituent quark distribution times a rapidity dependent soft factor from staple-shaped Wilson lines, for fixed parton longitudinal momentum and transverse separation. The results are evolved to higher rapidities using the Collins-Soper kernel and higher resolution using renormalization group evolution. The comparison to existing extractions of pion TMDs from Drell-Yan data is briefly discussed.
| Original language | English |
|---|---|
| Article number | 034039 |
| Pages (from-to) | 1-17 |
| Number of pages | 17 |
| Journal | Physical Review D |
| Volume | 112 |
| Issue number | 3 |
| DOIs | |
| State | Published - Aug 29 2025 |
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