25-30 September 2011
Sant Feliu de Guixols, Spain
Europe/Madrid timezone

Inclusive search for a fourth generation of quarks

Not scheduled
Sant Feliu de Guixols, Spain

Sant Feliu de Guixols, Spain


Petra Van Mulders (Vrije Universiteit Brussel)


We present a search for fourth generation chiral quarks of the up- and down-type in 7 TeV proton collisions recorded by the CMS experiment at the LHC. Final state topologies with b' and t' quarks produced singly or in pairs are studied in the 2011 data corresponding to an integrated luminosity of 1.1 fb^{-1}. Degenerate masses are assumed for the fourth generation quarks. The inclusive search is performed in the decay channel where one isolated muon with a high transverse momentum is identified and results in model dependent limits on the mass of the chiral quarks and the relevant CKM4 matrix elements. For minimal off-diagonal mixing between the third and the fourth generation, a limit m_{t'} > 490 GeV/c^{2} is obtained at 95% C.L.


A new inclusive search strategy is presented resulting in the most stringent limit to date on the mass of an up-type fourth generation quarks.

Primary author

Petra Van Mulders (Vrije Universiteit Brussel)

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