3D Quark-gluon Structure of Hadrons: Mass, Spin, and Tomography

Grants and Contracts Details


Hadrons, including the proton and neutron, make up the majority of the visible matter in the universe. Thus, understanding their structure is of fundamental importance. As a frontier aspect of sub-atomic physics the nucleon has been under intensive investigation for the last several decades. Tremendous progress has been made, in particular, in mapping out the one-dimension momentum distribution of the nucleon''s constituents, i.e., the Feynman parton distribution functions (PDFs). These investigations not only unveil the partonic structure of the nucleon, but also provide an important opportunity to study the strong interaction, one of the four fundamental forces in our universe. Still, essential questions remain to be answered: how do the spin and orbital degrees of freedom of the quarks and gluons within the nucleon combine to make up its total spin? What is the origin of the mass of the nucleon and other hadrons? Do gravitational form factors inform us about the origin of mass and can they be extracted from measurements? Where are the quarks and gluons located within the nucleon? How does the quark-gluon structure of the nucleon change when it is bound in the nucleus? All these urgent questions have stimulated further theoretical and experimental investigations in the hadron physics community and major facilities have been and will be built to explore them.
Effective start/end date1/15/231/14/24


  • Temple University: $18,600.00


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