Choose timezone
Your profile timezone:
Experimental Particle and Astro-Particle Physics Seminar
→
Europe/Zurich
Description
Abstract: While being remarkably successful at describing precision data collected in a wide range of experiments, the Standard Model (SM) of particles is known to be incomplete. Phenomena such as the baryon asymmetry of the universe, the hierarchy problem, or the observed flavor structure of the fermion sector are commonly believed to find an explanation in theories beyond the SM, showing up at higher energies above the electroweak scale. Due to the broad range of candidate theories, a model-independent effective field theory approach is advantageous. In this sense, the SM is viewed as an effective low-energy remnant of the underlying BSM theory, and new-physics effects are described by additional higher-dimensional operators. This so-called Standard Model effective field theory (SMEFT) allows for a combined and model-independent analysis of different data sets, while controlling the presence of hierarchies through renormalization group methods. The price to pay is a proliferation of the number of free parameters, especially in the flavor sector.
In this presentation we will introduce effective field theory methods and discuss the construction of the SMEFT. Special emphasis will be given on the practical application of the SMEFT for phenomenological BSM studies. We will review all steps typically involved in these analyses and discuss concrete examples.