Search for New $T^\prime$ Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in ppbar Collisions at sqrt(s) = 1.96 TeV

Understand

We present a search for a new particle T' decaying to a top quark via T' -> t + X, where X goes undetected.

• We use a data sample corresponding to 5.7 fb-1 of integrated luminosity of ppbar collisions with sqrt{s} = 1.96 TeV, collected at Fermilab by the CDF II detector.
• Our search for pair production of T' is focused on the hadronic decay channel, ppbar -> T'T' -> tt +XX -> bbqqqq + XX.
• We interpret our results in terms of a model where T' is an exotic fourth generation quark and X is a dark matter candidate.