Top Pair Production Background
Top pair production at ATLAS
... providing top quarks in un- precedented quantities, which allows detailed precision measurements and detailed ...studies. Top quark physics at LHC is a crucial milestone in both measuring the proper- ties ...
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Measurements of the Top Quark Pair-Production Cross Section
... precision top quark physics, which started at the Tevatron, is now continuing at the ...¯ production, but also to understand this important background to Higgs production as well as in new ...
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Top quark pair production cross section with the ATLAS experiment
... s = 8 TeV The last analysis shown in this document is the only one available currently at √ s = 8 TeV sample, and it uses a total integrated luminosity of 5.8 fb −1 . In this case, the selection criteria is tightened to ...
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Measurement of the Top Quark Pair Production Cross Section in pbarp Collisions
... of background in the , 1 jets y m analysis is also W 1 jets ...tt production is then determined by the fraction of jets in multijet events that are ...a background dominated sample satisfying all ...
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Top pair production at CMS (includes charge asymmetry and ttbar resonance)
... The top quark is the heaviest fundamental particle de- scribed by the Standard Model of particle ...of top quarks based on their decay products. Top quark produc- tion is an important process to ...
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Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector
... The same treatment is used for the uncertainty associated to the measurement of the background from charge misassign- ment, which is also subtracted from the control regions. The fit uses templates constructed ...
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First measurement of the forward backward charge asymmetry in top quark pair production
... largest background after W jets is from multijet production, where a jet mimics an isolated elec- tron or ...this background are derived from samples of data that fail lepton ...this ...
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Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
... t production together with a photon pair. The background processes also include non-t t H ¯ Higgs boson production: mainly associated production with a single top quark t H and ...
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Boosted Top Quarks, Top Pair Resonances, and Top Partner Searches at the LHC
... Vector-like top quark partners have many possible decay modes, such as t 0 → bW , tZ, tH, which can give distinct final states rich in b-jets and boosted vector ...main background to this search is Stan- ...
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Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
... the production of t ¯ t W and t ¯ t Z. The t t W ¯ background tends to have lower jet multiplicity than the signal and so the leading contri- bution comes from events with additional high-p T jets; it is ...
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Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
... The systematic uncertainties on this procedure are estim- ated by checking a) its ability to successfully predict the non- prompt background in t¯t simulation and b) the stability of the prediction using data when ...
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Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
... the production of t ¯ t W and t ¯ t Z. The t t W ¯ background tends to have lower jet multiplicity than the signal and so the leading contri- bution comes from events with additional high-p T jets; it is ...
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Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
... the production of t ¯ t W and t ¯ t Z . The t t W background ¯ tends to have lower jet multiplicity than the signal and so the leading contri- bution comes from events with additional high-p T jets; it is ...
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Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
... the production of t ¯ t W and t ¯ t Z . The t t W background ¯ tends to have lower jet multiplicity than the signal and so the leading contri- bution comes from events with additional high-p T jets; it is ...
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Search for top-quark-pair associated Higgs production with tau leptons using the ATLAS detector at the LHC
... The background is dominated by processes with two real light leptons and one fake τ had . The correspond- ing physical processes that contribute are t¯t with 90% and Z +jets with 10%. The origin of the τ had fakes ...
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Measurement of the top quark pair production cross-section involving a Tau & Muon Studies with TileCal in ATLAS
... quark background are obtained by fitting templates to the ...the background, reason why this analysis is focused on this ...of background can come from pro- cesses with a lepton where a jet is ...
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Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at s =8 TeV with the ATLAS detector
... the background comes from the associated production of Z bosons with heavy-flavor jets, which is not well predicted by MC ...Drell-Yan background in the same-flavor channels is computed ...
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Search for direct pair production of scalar top quarks in the single- and dilepton channels in proton-proton collisions at √s=8 TeV
... Figure 8. Left: comparison of data and simulation in the M `b 0 distributions for events with 50 < M T < 80 GeV and zero b jets. Right: shape comparison between tt → 1` and W+jets for M T > 100 GeV. agree well with each ...
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Theoretical overview on top pair production and single top production
... the top quark is heavier than all other known elementary particles, from the second one we deduce that the lifetime of the top quark is shorter than the characteristic hadronisation time ...the top ...
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New physics in top pair production
... • No hints of new physics yet! • Many analyses still in preparation All results on public web pages: – ATLAS: https://twiki.cern.ch/twiki/bin/view/AtlasPublic/TopPublicResults – CMS: ...