Baryons as topological solitons

Abstract: In this talk, I will discuss the mathematical and physical motivations that allow us to identify the solitonic solutions of a Mesonic Field Theory, called the Skyrme model, as Baryons in Large-N QCD. In the first part of the talk, I will present the general idea of solitons in Physics, giving a simple example from Classical Mechanics. Then, I will finally introduce the Skyrme model, a possible candidate for the low-energy QCD Lagrangian at large N, and I will show the existence of solitonic solutions, known as Skyrmions, in that theory. These solutions are characterized by a conserved charge called topological index and for this reason are known as topological solitons. That conserved charge has been physically identified with the baryon number and thus consequently the Skyrmions have been identified with the Baryons. Physical predictions concerning baryon physics, as well as nuclear physics, can be computed and compared with the experiments. In this regard, I will present some good results and some problems of the model.

astrophysicscondensed mattergeneral relativity and quantum cosmologyhigh energy physicsmathematical physicsclassical physicsgeneral physics

Audience: researchers in the topic

Theoretical physics seminar @ Tartu