February 1, 2018 at 5:30 pm

INPP Seminar | Unravelling Quarks and Gluons Inside the Nucleons, Feb. 27

The Institute of Nuclear and Particle Physics (INPP) presents Maxime Defurne, of the French Alternative Energies and Atomic Energy Commission (CEA),  on “Unravelling Quarks and Gluons Inside the Nucleons”, on Tuesday, Feb 27, at 4 p.m. in Edwards Accelerator Lab, Roger W. Finlay Conference Room.

Maxime Defurne

Maxime Defurne

Abstract: Since the deep inelastic experiments at SLAC in the 60s, we know that protons and neutrons are made of quarks and gluons, also called partons.

At high energy, the strong coupling constant is small enough that perturbation theory can be applied. But, at the energy scale of the nucleons, the strong coupling constant is too large to derive the structure of nucleons with perturbative QCD. To reveal this complex structure, lepton scattering experiment has proven to be a powerful tool.

In this talk, we will briefly present the history of hadronic physics before focusing on the worldwide research program about the generalized parton distributions starting in the mid 90s. The GPDs encode the correlations between longitudinal momentum and transverse position of the partons inside the nucleon and are accessible via exclusive electroproduction of photon or mesons. We will first present the theory of the GPDs before discussing the current experimental status. Finally we are going to focus on the next generation of experiments at Jefferson Laboratory and how they will improve our current knowledge of the GPDs and deep exclusive processes.

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