Speaker
Leonard Gamberg
(Penn State University Berks)
Description
I will report on the application of the improved Collins-Soper-Sterman (iCSS) factorization formalism for the case of polarized observables, such as the Sivers effect in semi-inclusive deep-inelastic scattering. I will discuss how this study is being extended beyond leading order; this has direct impact on issues of relating/matching TMDs onto collinear twist-3 functions. I will briefly discuss the validity of the well-known relations, such as between the weighted TMD Sivers function and the collinear twist-3 Qiu–Sterman function, and their use in phenomenological studies of the 3-D structure of hadrons.
Authors
Leonard Gamberg
(Penn State University Berks)
Andreas Metz
(Temple University, Philadelphia)
Daniel Pitonyak
(Lebanon Valley College)
Alexey Prokudin
