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Dr. Hamza Atac

The Department of Physics Colloquium Series Presents

 

Dr. Hamza Atac

 

Generalized Polarizabilities of the Proton

 

The Generalized Polarizabilities are fundamental properties of the proton, that characterize the system’s response to an external electromagnetic (EM) field. They describe how easily the charge and magnetization distributions inside the system are distorted by the EM field, mapping out the resulting deformation of the densities in the proton. As such, they reveal unique information regarding the underlying system dynamics and provide a key for decoding the proton structure in terms of the theory of the strong interaction that binds its elementary quark and gluon constituents together. Recent measurements of the proton GPs have challenged the theoretical predictions, particularly in regard to the electric polarizability. The magnetic GP, on the other hand, can provide valuable insight to the competing paramagnetic and diamagnetic contributions in the proton, but it is poorly known within the region where the interplay of these processes is very dynamic and rapidly changing. In this talk we will discuss recent results from the VCS-I experiment at JLab, the upcoming VCS-II experiment, as well as the potential to access the GPs with alternative experimental methods. 

 

 

Physics Department
Colloquium
Thursday, February 29, 2024
4:00pm-5:00pm
         Gardiner Hall, Room 230
Host: Dr. Michael Paolone
Refreshments served at 3:45pm