Thursday, September 18, 2008, 16:00
WHGA Auditorium
C. Grojean, CERN
Abstract:
How do elementary particles acquire their mass? What is making the
photon different from the Z boson? In a word: How is electroweak
symmetry broken? This is one of the pressing questions in particle
physics that the LHC will answer soon. The usual Higgs mechanism is
incomplete because of the quantum instability driven by radiative
corrections. I will review some recent attempts to go beyond a Higgs. In
particular, I will describe composite models (where the Higgs boson
emerges from a strongly-interacting sector) and Higsless models.
Distinctive signatures at the LHC are expected and will reveal the true
nature of the electroweak symmetry sector.