Dear Colleagues,

 on Monday 13 DECEMBER, at 4.30 pm there will be the next Jerzy Pniewski and Leopold Infeld COLLOQUIUM of the Faculty of Physics.

This time our meeting will be exclusively ONLINE.

 Our guest will be: prof. ANNA STAŚTO (Penn State University, USA), who will give a lecture:

 "Forever confined but asymptotically free".

 After the Hamburg-based HERA accelerator, which collided electron and ion beams, was terminated in 2007, the idea of creating a similar, but more powerful, accelerator in the US emerged. In 2015, the US Department of Energy's Nuclear Science Advisory Committee approved the idea and allocated funds (around 2 billion USD) for its construction.

Construction work officially began last year. Prof. Staśto's lecture will familiarise us with the state of knowledge regarding the structure and interactions within nucleons, as well as the cognitive perspectives offered by the newly built accelerator.

 You will find the lecture abstract below this message.

 For efficient participation in the seminar (issue of registration and proper functioning of the waiting room) we recommend updating Zoom. Please find attached a guide where to look for the upgrade button.

Link to register for the meeting:

https://us02web.zoom.us/meeting/register/tZIpcOuurDwoHtKL-lYSDQP7e_bd31iTMbhx

Once registered, you will receive an email confirmation with information on how to join the meeting.

 For informal discussions, please join us starting at 4 pm.

PS. The next Conversation will take place on 17 January 2022.

prof. ANNA STAŚTO (Penn State University, USA) "Forever confined but asymptotically free"

The strong interaction is one of the four known forces in nature.

It is responsible for the creation of nuclei and for binding quarks into nucleons. Two intriguing phenomena characterize the strong interaction which is confinement and asymptotic freedom.

The complexity of strong interaction leads to the richness of the nucleon structure which can be best explored in the high energy electron - nucleon collisions. In this talk I will discuss what we know about the nucleon structure as well as the prospects of expanding our knowledge about strong interactions through the new accelerator facility, Electron Ion Collider (EIC) in the US.