Top quark
Measurement of Top Quark Polarisation in T-Channel Single Top Quark Production
... single top quark background ...(e.g. top quark mass, renormalisation and factorisation scales, ...single top quark processes are normalised to approximate ...
38
Measurement of the top quark mass in the dilepton channel
... We estimate the effect of uncertainties in the shape of the background distributions to determine the background uncer- tainty. For the MWT analysis we also perform tests with en- sembles in which we varied the ...
8
Search for the associated production of the Higgs boson with a top-quark pair
... In addition to the rate uncertainties coming from the NLO or better cross section calculations, the modeling of the tt + jets (including tt + bb and tt + cc), ttV, diboson+jets and the W/Z + jets processes are subject to ...
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Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton plus jets final state in pp collisions at root s=13 TeV
... the top quark and W boson are highly Lorentz- boosted, resulting in a three-jet event ...vector-like quark T decaying to a Z boson and a top quark in the dilepton + jets final state has ...
33
Search for a $W$ ' boson decaying to a bottom quark and a top quark in $pp$ collisions at $\sqrt{s}=7$ TeV
... single top quark production and show a mini- mum corresponding to the destructive interference between the amplitudes for production of left-handed fermions via the W and W 0 ...
33
Combination of the top-quark mass measurements from the Tevatron collider
... The top quark is the heaviest known elementary particle, with a mass about 40 times larger than the mass of its isospin partner, the bottom ...bottom quark. Using top-antitop pairs at the ...
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Searches for W ' bosons decaying to a top quark and a bottom quark in proton-proton collisions at 13TeV
... a top quark and a W boson as background, while the leptonic analysis further considers both t- and s-channel single top quark, Z or γ ∗ +jets, and diboson (WW, WZ and ZZ) ...
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Experimental discrimination between charge 2e/3 top quark and charge 4e/3 exotic quark production scenarios
... The heavy particle discovered by the CDF and D0 Collaborations at the Fermilab Tevatron proton-antiproton collider in 1995 [1] is widely recognized to be the top quark. Currently measured properties of the ...
7
Precision measurements of the Top quark with the ATLAS experiment
... single top quark production is characterized by events with exactly one isolated lepton (e or µ), missing transverse energy and two or three jets, where at least one is ...single top quark ...
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Search for Anomalous Wtb Couplings in Single Top Quark Production
... the top quark in ...in top quark decays [ 14 ]. The predicted single top quark production cross sections for the s and t channels combined are 2:7 0:3 pb if f ...
7
Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at s=13 TeV
... a top quark pair only, this analysis also includes production modes with a single top ...single top quark or the top quark pair ...a top quark and ...
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Tau (or no) leptons in top quark decays at hadron colliders
... The top quark pair production cross section in the final state with one hadronically decaying tau lepton together with additional jets is also ...the top quark pair signal from the W+jets and ...
8
Single top quark at future hadron colliders: Complete signal and background study
... single top quark production and all the basic background processes at the upgraded Fermilab Tevatron and CERN LHC ...single top quark physics even during LHC operation at a low ...
9
Measurement of the top quark mass using proton-proton data at root(s)=7
... single top quark background is simulated using POWHEG ...single top quark samples are normalized to the theoretical predictions described in ...
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Model-independent measurement of the W-boson helicity in top-quark decays at D0
... the top quark is varied by 2:3 GeV, and the jet reconstruction efficiency, energy calibration, and b fragmentation parameters by 1 around their nominal ...
7
Search for electroweak production of a vector-like quark decaying to a top quark and a Higgs boson using boosted topologies in fully hadronic final states
... vector-like top quark partner (T) of charge 2/3. The T quark appears in many extensions of the standard model (SM) and usually mixes with the SM top quark ...SM top or bottom ...
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Measurement of the W boson polarization in top quark decays with the ATLAS detector
... In the single-lepton channels, the following six processes were used as templates: three different helicity state signal processes, the background from events with misidentified lep- tons, the W +jets contribution and ...
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Measurement of Top Quark Polarization in Top-Antitop Events from Proton-Proton Collisions at $\sqrt{s}$ = 7 TeV Using the ATLAS Detector
... the top quark mass is performed by repeat- ing the fitting procedure using seven samples with differ- ent mass settings in the simulation, and interpolating the change in the parameter f corresponding to a ...
19
Precise Measurement of the Top-Quark Mass from lepton plus jets Events
... In this Letter, we present the most precise single mea- surement of the top-quark mass from Run II of the Fermilab Tevatron collider. It uses a matrix element (ME) method with an in situ jet energy ...
7
Measurement of the W boson helicity in top quark decays at D0
... a top quark mass is assumed, the kinematics can be solved algebraically with a four-fold ambiguity in addition to the two-fold ambiguity in pairing jets with ...
8