Speaker
Arturo Arroyo Castro
(UCM)
Description
The transverse momentum dependent (TMD) factorization theorem incorporates several types of power corrections to the leading term. For large values of transverse momentum, $q_T/Q$ corrections become significant. They arise from higher-twist TMD distribtuions, which are singular at small transverse distances. We propose a method that reveals this singularity and makes the $q_T/Q$ correction manifest. As an application, we consider twist-three TMD distributuions and compute the $q_T/Q$ corrections to next-to-leading power angular coefficients for unpolarized Drell-Yan. The result is in complete agreement with the data.
Authors
Alexey Vladimirov
(Universidad Complutense de Madrid)
Arturo Arroyo Castro
(UCM)
IGNAZIO Scimemi
(Universidad Complutense madrid)