Top Quark Physics at Hadron Colliders

Search for the Standard Model Higgs boson in the decay mode H→ W⁺W^-→ ℓ⁺vℓ^-v

“…These are the experimental signature of quarks or gluons caused by the hadronisation Figure 4.5: Schematic of the jet development illustrating the idea of jet energy scale corrections, taking energy measurements on the calorimeter level to the particle or the parton level [9].…”

Measurements and searches with top quarks

“…The total tt acceptance P p (tt) can be written as 14) where P p denotes the event selection efficiency. Due to the different mass of the quark originating from the top quark decay, the tt event selection efficiency is expected to show a small dependence on R.…”

Perspectives for top quark physics at LHC

“…In the Standard Model (SM) the top quark is a spin 1 /2 fermion with electric charge Q t em = 3 /4 | e |, the weak isospin partner of the b quark, and a colour triplet [1,2]. Even within the SM the top quark is a very special object because of its much larger mass with respect to all the other fermions and the top quark Yukawa coupling is surprisingly close to one.…”

“…Therefore the LHC accelerator can be considered as a real top quark factory compared to the Tevatron [1], where only few hundreds of events have been collected so far. Both ATLAS [4] and CMS [5] have conducted extensively studies in the top quark sector, trying to search for new physics by probing the SM.…”