Bi-weekly IIHE Internal Seminar: Giuseppe Fasanella, "Search for vector-like replicas of the top quark with the CMS experiment"

Thursday 6 Nov 2014, 11:00 → 12:00 Europe/Brussels

Large seminar room (Universe)

The recent discovery of a Higgs boson at the LHC sets strong constraints on a simple, sequential third generation of quarks. Still, the presence of new physics is necessary to stabilize the mass of the Higgs boson, if one wants to avoid an unnaturally high level of fine tuning of the theory. In supersymmetry, bosonic top quark partners would cancel the loops that induce this large instability. Similarly, fermionic top quark partner quarks can also serve this purpose. I'll present a search for a new T particle, which is a vector-like partner of the top quark, focusing on the T quark pair production. Data were collected with the CMS experiment during the year 2012, in proton-proton collisions at the LHC at a centre-of-mass energy of 8 TeV.