A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
arXiv:1207.2409 · doi:10.1007/JHEP09(2012)041
Abstract
A search for resonant production of high-mass top-quark pairs is performed on 2.05 fb^-1 of proton-proton collisions at sqrt(s) = 7 TeV collected in 2011 with the ATLAS experiment at the Large Hadron Collider. This analysis of the lepton+jets final state is specifically designed for the particular topology that arises from the decay of highly boosted top quarks. The observed ttbar invariant mass spectrum is found to be compatible with the Standard Model prediction and 95% credibility level upper limits are derived on the ttbar production rate through new massive states. An upper limit of 0.7 pb is set on the production cross section times branching fraction of a narrow 1 TeV resonance. A Kaluza-Klein gluon with a mass smaller than 1.5 TeV is excluded.
25 pages plus author list (47 pages total), 7 figures, 4 tables, matches published JHEP version
References in corpus (18)
- PYTHIA 6.4 Physics and Manual
- Parton distributions for the LHC
- Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
- Implications of CTEQ global analysis for collider observables
- Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
- -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
- Single-top hadroproduction in association with a W boson
- Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production
- NNLL resummation for s-channel single top quark production
- Parton Distributions for LO Generators
- Boosted objects: a probe of beyond the Standard Model physics
- Theoretical status and prospects for top-quark pair production at hadron colliders
- Parton Distributions for LHC
- The Bulk RS KK-gluon at the LHC
- On hypothesis testing, trials factor, hypertests and the BumpHunter
- Kaluza-Klein Gluons as a Diagnostic of Warped Models
- Search for ttbar resonances in the lepton plus jets final state in ppbar collisions at sqrt{s}=1.96TeV
- Next-to-leading order QCD corrections to a heavy resonance production and decay into top quark pair at the LHC
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- A Flavorful Top-Coloron Model
- A complete next-to-leading order QCD description of resonant production and decay into final states