On Monday, June 5, 2023, at 12:00 p.m. c.t., the next meeting of our Physics Colloquium will take place.
Speaker is Prof. Dr. Marc Vanderhaeghen (Johannes Gutenberg-University Mainz) on the topic "Partonic imaging of hadrons: Status and perspectives - In memory of Prof. Dr. Maxim Polyakov"..
The proton is the nucleus of the most abundant atom in the visible Universe, i.e. hydrogen. It is composite and has a quark and gluon substructure, as revealed in the second part of the previous century by elastic and deep inelastic electron-proton scattering experiments. Around 50 years after the establishment of Quantum Chromo Dynamics as the quantum field theory describing the strong interaction within the Standard Model of particle physics, the precise way in which the quarks and gluons compose the proton and build up its global properties, i.e. its mass, momentum, charge, or spin distributions, as well as give rise to its excitation spectrum are still not well-known and understood. The past two decades have seen an important progress both theoretically and experimentally in exploring proton structure through hard exclusive processes. With the deeply virtual Compton process, it nowadays became possible to perform Compton Scattering directly at the quark level.
In this colloquium, an overview will be given of the resulting experimentally-based three-dimensional momentum-space imaging and tomography of the proton as well as of nucleon resonances. It will be shown how such information is connected to low-energy structure quantitiessuch as charge radii and polarizabilities which are crucial inputs in the interpretation of precision atomic spectroscopy experiments.
Abstract of the presentation by Prof. Dr. Vanderhaegen.
The introduction will be made by Prof. Dr. Evgeny Epelbaum.
The faculty cordially invites all interested parties. The event will take place in lecture hall HNB and hybrid via Zoom. Before the colloquium we offer coffee and cookies. This link will take you to the Zoom event (meetingID: 632 5520 9938, password: 526977). All dates of the Physics Colloquium can be found here.