Resummation, Evolution and Factorization REF 2026

Session

Talks XII

22 Oct 2026, 14:40

Santiago de Compostela, Spain

30. Recent developments in the PDF2ISR method in Pythia 8

Andris Potrebko (Université libre de Bruxelles (ULB))

22/10/2026, 14:40

The transverse-momentum spectrum of Drell--Yan lepton pairs at low $p_T (ll)$ provides a sensitive probe of transverse-momentum-dependent (TMD) parton densities and of the interplay between perturbative initial-state radiation and non-perturbative QCD effects. The PDF2ISR method provides an initial-state parton shower whose backward evolution is consistent with the forward evolution of the...

18. Pion-in-Jet Collins Asymmetries from RHIC to the EIC: Universality Tests and Constraints on Transversity

Prof. Umberto D'Alesio (University and INFN, Cagliari)

22/10/2026, 15:00

Spin-dependent azimuthal asymmetries provide a powerful probe of hadron transverse structure and TMD dynamics. In this talk, I will present a phenomenological study of Collins asymmetries in pion-in-jet production in polarized proton-proton collisions within a TMD framework with a collinear initial-state configuration. Using transversity distributions and Collins fragmentation functions...

33. Enhanced coherence-violating logarithms in non-global QCD observables

Saad Nabeebaccus (University of Manchester)

22/10/2026, 15:20

In this talk, I will discuss a class of non-global observables in which transverse-energy flow is vetoed inside an azimuthal interval $\Delta\phi$ defined with respect to a suitable reference axis. Such vetoes are widely used in measurements involving missing transverse momentum at the LHC and probe a kinematic regime that has not previously been explored. We show that these observables...

21. SGR Resummation and pp cross-sections at 13 TeV

Giulia Pancheri (INFN Frascati)

22/10/2026, 15:40

I will discuss the role played by transverse momentum distributions of initial state Soft Gluon Resummation (SGR) in the rise of the total hadronic cross-section [1] and the forward slope of the elastic differential cross-section. I will review the eikonal mini-jet model we developed with SGR inspired by Touschek resummation method for QED, based on the Bloch and Nordsieck theorem, statistical...