Conférence (Physique) : Higgs discovery: an historical turning point for Particle Physics and Cosmology

Organisé par l'Institut Nonlinéaire de Nice
Quand ? Le 14-03-2014,
de 11:00 à 12:30
Où ? Institut Nonlinéaire de Nice, 361 routes des Lucioles, Sophia Antipolis, Valbonne
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Pascal Pralavorio 

Centre de physique des particules de Marseille

Higgs discovery: an historical turning point for Particle Physics and Cosmology



The 2013 Nobel Prize in Physics was attributed to Francois Englert and Peter Higgs for their theoretical discovery of the origin of subatomic particle mass in 1964.  

This discovery predicts a particle (the Higgs boson) which was until recently missing experimental confirmation.  
This particle is of particular importance since it was the last missing piece of the Standard Model of Particle Physics, which provides a correct description of subatomic and electromagnetism forces down to 10^{-18} m.  
The Higgs boson discovery came in July 2012 at CERN. This announcement tentatively closes 130 years of theoretical and experimental searches  in the infinitesimal started with Maxwell in 1867 and Becquerel in 1896. We are therefore leaving an Higgstorical time! In this seminar I will present how ATLAS  and CMS, energy frontier experiments located at CERN near Geneva and gathering research groups of 3000 scientists each, tracked successfully the Higgs boson.  

These experiments also actively search for physics beyond the Standard Model that should accompanied the Higgs boson (supersymmetry, extra dimensions ...) and I will give the present status. Each time I will underline the impact of these new results on primordial cosmology, the first particle physics "experiment".  
I will conclude by presenting the next fundamental questions in particle physics and how we could answer them.  
This seminar is addressed to physicists with no particular knowledge in particle physics.