Conférences et séminaires » Séminaire présenté par Michel Rausch de Traubenberg, IPHC-DRS, (...)
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Strengths and weaknesses of the standard model
Par : Michel Rausch de Traubenberg, IPHC-DRS, Strasbourg
Date : mardi 7 février 2012 à 10h00
Lieu : IPHC, Salle de Réunion 2e étage du Bâtiment 27
The standard model of particle physics is incredibly successful and is compatible with (almost) all experimental results. It is based on symmetry principles (gauge principles and principle of equivalence). We firstly show the powerfulness of the symmetry principles in particle physics in relation to the constraints imposed by quantum and relativistic physics. Then, we show how experimental results (β decay, discovery of the (predicted) Ω spin−3/2 baryon) progressively allow for the elaboration of the standard model. We conclude this section by discussion upon the status (theoretical and experimental) of the Higgs boson and upon the advantages and defaults of the standard model.
Despite its success, it is strongly believed that the standard model is an effective theory of a more fundamental one. In the second part we will briefly present some models beyond the standard model : supersymmetry (which is a symmetry between fermions and bosons), grand-unified theories (which unify all known gauge interactions in a single interaction) and extra-dimensions (which have interesting cosmological consequences and provide some unification between gravity and the three other interactions).
Personne à contacter : Kamila SIEJA