Boosted Top Quarks, Top Pair Resonances, and Top Partner Searches at the LHC

Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC

We perform a model-independent study for top-antitop and top-top resonances in the dilepton channel at the Large Hadtron Collider. In this channel, we can solve the kinematic system to obtain the momenta of all particles including the two neutrinos, and hence the resonance mass and spin. For discovering top-antitop resonances, the dilepton channel is competitive to the semileptonic channel beca...

Like Sign Top Pair Production at Lhc

Having a mass comparable to the weak scale, the top quark may have a sizable flavor changing couplings to Higgs bosons. We show that such couplings can be probed at the LHC through the parton subprocess c(¯ c)g → t(¯ t)A 0 , where the pseudoscalar A 0 subsequently decays into t¯ c or ¯ tc, giving rise to the intriguing final state of like sign top quark pairs. We also discuss major backgrounds ...

Searches for Scalar Top and Bottom Quarks at the Tevatron

Searches for the supersymmetric partners of top and bottom quarks using data up to 340 pb −1 taken at the Tevatron p ¯ p collider are described. We report on searches for scalar top quarks˜t in the decays˜t → c ˜ χ 0 1 and˜t → bl˜ν and for scalar bottom quarks˜b in the decay˜b → b ˜ χ 0 1. No evidence for a signal has been found, but improved exclusion regions have been derived in the framework...

Studies of Highly-boosted Top Quarks Near the TeV Scale Using Jet Masses at the LHC

TeV resonances in top physics at the LHC

We consider the possibility of studying novel particles at the TeV scale with enhanced couplings to the top quark via top quark pair production at the LHC and VLHC. In particular we discuss the case of neutral scalar and vector resonances associated with a strongly interacting electroweak symmetry breaking sector. We constrain the couplings of these resonances by imposing appropriate partial wa...