Please visit Jefferson Lab Event Policies and Guidance before planning your next event:

May 20 – 24, 2018
Drury Plaza Hotel
US/Mountain timezone

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

May 24, 2018, 10:30 AM
O'Keefe Ballroom (Drury Plaza Hotel)

O'Keefe Ballroom

Drury Plaza Hotel

828 Paseo de Peralta, Santa Fe, New Mexico 87501


Fulvio Piacenza (Pavia University)


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 transverse momentum also at large qT. This is intended to parametrize possible higher-twist effects which are presently not under theoretical control.

Presentation materials