"Nature of the New Boson: a lonely Higgs, or the first of many cousins?"

SPA Colloquium
Prof. James Olsen
Dr Marcella Bona
January 17th, 2014 at 16:30
David Sizer Lecture Theatre

Recent measurements from the ATLAS and CMS experiments indicate that the new boson discovered in 2012 at the Large Hadron Collider (LHC) at CERN is a Higgs boson.  In the standard model of particle physics, one Higgs boson is sufficient to give mass to the W and Z particles, as well as the fundamental fermions (quarks and leptons), while also ensuring that the photon remains massless.  Although this is the most economical scenario that explains electroweak symmetry breaking and the origin of fundamental particle masses, motivated extensions of the standard model predict multiple Higgs bosons with a rich phenomenology that could be detectable at the LHC.  In this talk I will present latest measurements of the properties of the newly discovered boson and give an overview of the search for additional Higgs bosons.  I will also discuss briefly the prospects for the coming LHC run at higher energy, which is planned to begin in 2015.

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