Argonne Physics Division Seminar - 3:30 PM, Thursday, 8 Jun 2017

Building 203, Conference Room B221

In Quantum Chromodynamics, the theory of the strong interactions, the nucleon emerges as a relativistic strongly interacting system of quarks and gluons (partons). QCD factorization theorems provide a reliable theoretical formalism that enables one to connect hadron observables to their confined parton degrees of freedom. With the use of collinear factorization, experiments have provided a well documented one-dimensional (longitudinal momentum) snapshot of the nucleonâ€™s internal structure in terms of universal collinear parton distribution functions.

In more recent years, new data sensitive to the transverse momentum partonic structure of hadrons are now available worldwide; among them the COMPASS experiment at CERN (from the earlier HERMES experiment at DESY), RHIC at BNL, Drell-Yan experiments at Fermi Lab, and SIDIS experiments at JLAB. In turn, theoretical advances enabled a paradigm shift in our picture of the partonic structure of the nucleon, which is now three dimensional in momentum space (or one dimension longitudinal, and 2 Fourier spatial degrees of freedom). This more detailed structure is encoded in the transverse momentum dependent parton distribution functions (TMD PDFs). I will present new work that relates TMD and collinear QCD factorization in a generalized framework. This work is preformed in the spirit of providing a quantitative link between measurements and the 3-D partonic structure of the nucleon.

Argonne Physics Division Seminar Schedule