[PDF] Top 20 Search For Direct Pair Production Of Supersymmetric Top Quarks Decaying To All-hadronic Final States In Pp Collisions At Root S=8 Tev

... Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of Physics; the Institut National de Physique Nucléaire et de Physique des Particules/CNRS, and Commissariat à ... See full document

... clusters in the electromagnetic calorime- ter [28,29] ...combining in- formation from the tracker and the muon detectors [30] ...produced in the decays of W and Z bosons. In or- der ... See full document

... implemented in the F AST J ET package [56,57] is used to define two types of jets for this analysis: small-R jets with a radius parameter of R ¼ ...independently of each other from ... See full document

... parameterization of Eq. (3) is sufficient. Therefore, in the likelihood fit, no corrections to the parametrization are ...The S QCD i,j,k factors are treated as nuisance parameters constrained ... See full document

... estimated to be less than 20% (30%) for M T2 < 275 (M T2 > 275) GeV. To assess these uncertainties, the p T dependence of the ratio is studied in data and compared to simulation ... See full document

... uncertainties in the signal samples are taken into ...[16] to a precision of 2.6% and the efficiencies of triggers (Section ...applied to the signal yield are known with a precision ... See full document

... A search has been performed for pair production of heavy res- onances decaying to pairs of jets in four-jet events from proton– proton collisions at √ ... See full document

... are top-quark pair production and diboson ...) in regions mutually exclusive to the SRs, using BDTG intervals much more populated with t¯ t events, while all other SM background ... See full document

... Results of a search for decays of massive particles to fully hadronic final states are ...This search uses 20.3 fb −1 of data collected by the ATLAS detector ... See full document

... feature of the CMS apparatus is a superconducting solenoid, 13 m in length and 6 m in diameter, which provides an axial magnetic field of ...2π in azimuth and | η | < 2.5 in ... See full document

... a search for the electroweak production of super- symmetric particles in pp collisions in final states with two τ ...corresponds to an integrated ... See full document

... feature of the CMS apparatus is a superconducting solenoid of 6 m internal diame- ter, providing a magnetic field of ...an all-silicon pixel and strip tracker, a lead tungstate crystal ... See full document

... expected in the data. Because of the very large tt background, the direct obser- vation of events leading to a measurement of σ tttt is ...However, in many models beyond ... See full document

... tested in data using two independent single-muon triggered samples containing exactly one b jet (expected to contain roughly equal tt and W+jets contribution) and exactly two b jets (expected to have ... See full document

... number of events found after all selections, in- cluding b tagging, for data, SM background, and ...deficit in the number of events observed compared to the SM back- ground ... See full document

... used to fully reconstruct tt events resulting in an improved mass resolution of the hadronically decaying ...event to the hypothesis for the production of two top ... See full document

... result of a search for flavor changing neutral currents (FCNC) through single top quark production in association with a photon is ...proton-proton collisions at a ... See full document

... those in lepton reconstruction efficiency, energy scale, energy resolution and in the modelling of the trigger e fficiency [ 36 , 37 ], are found to have a small impact on the results and are ... See full document

... models in the pure T2tt sce- nario, and in the mixed T2tb scenario assuming a 50% branching fraction for each of the two decay modes ( e t → t χ e 0 1 / e t → b χ e ± 1 ...). In the latter ... See full document

... mass of approximately 125 GeV was discovered by the CMS and ATLAS experiments [ 1 – 3 ] at the CERN ...properties of the new boson are con- sistent with those predicted for the standard model (SM) ... See full document