QCD Evolution 2018

Session

Session 16

May 24, 2018, 10:30 AM

Drury Plaza Hotel

Conveners

Session 16

• Markus Diehl

46. Collinear factorization and intrinsic transverse momentum in low-energy Drell-Yan

Fulvio Piacenza (Pavia University)

5/24/18, 10:30 AM

In this talk, we discuss the transverse momentum distribution of Drell-Yan lepton pairs in fixed-target Drell-Yan experiments. We show that fixed-order theory underestimates data at large qT, by an amount that cannot be explained by perturbative truncation errors nor PDF uncertainties. We consider a modification of the standard collinear formalism that includes the effect of intrinsic...

47. A numerical study of TMDs using Ogata's formula

Terry John (UCLA)

5/24/18, 11:00 AM

Twist-3 Generalized Parton Distributions (GPDs) may provide an alternative source of information on quark orbital angular momentum. Additionally, twist-3 GPDs embody information on the spatial distribution of quark-gluon correlations. Spectator models are used to study general features that appear in twist-3 GPDs. We find in 1 loop calculations/spectator models that twist-3 generalized parton...

48. Twist-2 transverse momentum distributions at NNLO in QCD

Daniel Gutierrez-Reyes (Universidad Complutense de Madrid)

5/24/18, 11:30 AM

The factorization theorem for DY and semi-inclusive DIS holds for all leading twist transverse momentum distributions. However a QCD perturbative calculation shows several important characteristics of spin-dependent distributions. We consider all the different spin-dependent distributions which can be matched onto integrated twist-2 functions, focusing on the Helicity, Transversity and...