A consistent approach to the study of TMD hadronic structure

by Tommaso Rainaldi (ODU)

Friday 7 Mar 2025, 11:00 → 13:00 US/Eastern

CFNS Library (https://bnl.zoomgov.com/j/1614715193?pwd=WkwxODVWdzZzb29zQnZRVGp3VTBDQT09)

A consistent approach to the study of TMD hadronic structure

 

The internal structure of the hadrons is highly nontrivial due to the complications the strong interactions between the quarks and gluons that compose them. However, factorization theorems give us a way to relate physical observables with intrinsic properties of the hadrons by factorizing apart the process dependent contributions from the intrinsic information about the target hadron. Factorization theorems for processes like SIDIS and Drell-Yan allow to study the so called transverse momentum dependent distributions (TMDs), which describe the internal structure of the target hadron in terms of the three-dimensional momentum distribution of its consituents.

Parametrizing TMD parton densities and fragmentation functions in ways that consistently match their large transverse momentum behavior in standard collinear factorization and correctly reproduces the integral relation between TMD and collinear distributions has remained notoriously difficult. We show how the problem is solved within our framework and explicitly present a first practical implementation in a phenomenological study of Drell-Yan data. We compare and contrast general features of our methodology with other common practices and emphasize aspects that we view as improvements.