[PDF] Top 20 Top quark properties using the ATLAS detector at the LHC

... The top quark is the heaviest known fundamental particle, leading to important theoretical and ex- perimental ...large top quark mass implies a large coupling to the Higgs boson and raises the ... See full document

... three properties (mass, charge and polarisation) of the top quark in t¯ t de- cays with the ATLAS detector [1] are ...the LHC comes mainly from gluon-gluon fusion. Each ... See full document

... The top quark, discovered at the Tevatron in 1995 by the CDF and DØ collaborations, is the heaviest known ...its properties are of interest to the under- standing of the strong and weak forces, as ... See full document

... The top quark is unique among the known quarks in that it decays before it has an opportunity to form hadronic bound ...its properties particularly interesting as one can access directly the ... See full document

... the top quark is the heaviest fundamental particle in the SM, with a mass equal to ...estimated using the ggF production (Figure 1b) where the Higgs is indirectly coupled to the top ... See full document

... in top quark decays as well as stud- ies backgrounds in certain new physics searches, such as those predicting a charged Higgs boson decaying as H ± ... See full document

... trained using the XGBoost package [25] to discriminate the t t H ¯ signal from the main background ...single top quark t H and ggF in the Had region, and t H and associated production with a vector ... See full document

... in the search for the Standard Model Higgs boson. The same data set was further analysed to investigate the cou- pling properties of the new observed particle. Simplified benchmark models were used to study the ... See full document

... Top-quark pair and W t production are simulated with mc@nlo [33, 34], inter- faced with herwig [35] for the fragmentation and the hadronization processes, including jimmy [36] for the underlying event. The ... See full document

... Figure 8: Discrimination variables for the spin correlation on parton level in the di-lepton channel. The normalised distributions show the SM prediction in red solid lines and results for zero correlation in black ... See full document

... the top quark mass, the cross section of t t ¯ production in association of vector bosons (W, Z and γ ) and the measurement of the charge asymmetry are ...the top quark’s properties is ... See full document

... observables for the combined electron and muon selections at detector level are shown in figure 2. A fair agreement between the measurement and the predictions over a wide kinematic range is to be found. However, ... See full document

... The single top-quark final state can be used to search for additional charged heavy gauge bosons. The analysis performs a search in the W → t b ¯ → νb b ¯ decay mode. This process is similar to the SM s ... See full document

... in top quark pair production and in single top quark production, top quark mass, top quark properties and new physics searches in top quark ... See full document

... The mis-modelling of lepton trigger, reconstruction and selection efficiencies in simulation was corrected for by scale factors derived from auxiliary measurements of the processes Z → µµ and Z → ee [50, 51]. The ... See full document

... We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, ... See full document

... one top quark decaying into a charm quark and a Higgs boson (which itself decays into two photons with 100% branching ratio) were ...The top quark mass taken in the simulation is ...the ... See full document

... The top quark is known to be the heaviest particle in the Standard Model (SM) of elementary particle physics, more than 20 years after it has been discovered at the Tevatron in 1995 [1, ...the top ... See full document

... single top-quark final state is a key to searches for physics beyond the ...the top-quark could be a decay product of or could be coupling ...observed top-quark properties, ... See full document

... single top-quark production in the t-channel with the ATLAS detector in pp collisions at √ s=7 and 8 ...single top-quark events in the Wt production mode in the dileptonic decay ... See full document