Physics Events
[PAST EVENT] Physics Colloquium - Jacobo Ruiz de Elvira
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- Open to the public
Jacobo Ruiz de Elvira, University of Bern, Switzerland, Title of talk: Strong interactions and the precision frontier of Hadron Physics
Abstract: Although QCD is well established as the theory of strong interactions, the hadron spectrum is still not understood from ?rst principles. Nevertheless, the understanding of strong interactions with high precision has become in recent years a prerequisite for progress in nuclear and particle physics in many different areas. Dispersion relations are a consequence of causality, which mathematically translates into analyticity conditions on scattering amplitudes. In this talk, I will show how the fruitful combination of dispersion-theoretical methods with modern high-precision experimental data allows one to determine low-energy hadron observables with unprecedented accuracy. I will highlight this area of current research with two examples: pion-pion(kaon) scattering and the role of the lightest scalars mesons; 2. the mass of the nucleon and its connection to pion-nucleon scattering.