t' searches at the LHC

摘要

A minimal joining of electroweak symmetry breaking and flavorphysics occurs if a fourth family exists with quark masses in the 600 GeV range.Associated with this is the possibility of new flavor interactions accessible at theLHC, involving a new X gauge boson coupling preferentially to the third and fourthfamilies. et' production yields a high mass peak in the Wb invariant-mass spectrum,and we highlight the jet mass technique to identify W jets. X production and decayto τ~+τ~- also yields a high mass peak, reconstructed from visible decay productsand missing pT. Appropriate cuts are essential in both cases to sufficiently reducethe tt background.