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Physics and Astronomy

Physics & Astronomy Colloquium

3:30 PM, Friday, March 29, 2013
Room 155, Chem-Phys Building

Dr. Christoph Paus
Department of Physics
Massachusetts Institute of Technology


Unveiling the Mystery of Mass

One of the prime reasons the Large Hadron Collider (LHC) was built is to resolve the question of how particles acquire their mass. While it is very simple to measure particle masses and we have a model -- the Standard Model of Particle Physics -- which explains quite accurately all presently available measurements the seemingly trivial mechanism of how particle acquire their mass remains a mystery. The Standard Model invokes a new scalar gauge field to resolve this mystery but we have until recently not been able to find experimental evidence for its existence. On July 4, 2012, the CMS and ATLAS experiments have announced the discovery of a new Higgs-like particle at a mass of about 125 GeV. I will review our knowledge about the Higgs boson before the LHC started, discuss the discovery and the most recent updates from the LHC experiments.

Refreshments will be served in CP 179 at 3:15 PM