Search for direct top-squark pair production in final states with two leptons in pp collisions at sqrt(s)=8TeV with the ATLAS detector
arXiv:1403.4853 · doi:10.1007/JHEP06(2014)124
Abstract
A search is presented for direct top-squark pair production in final states with two leptons (electrons or muons) of opposite charge using 20.3fb-1 of pp collision data at sqrt(s)=8TeV, collected by the ATLAS experiment at the Large Hadron Collider in 2012. No excess over the Standard Model expectation is found. The results are interpreted under the separate assumptions (i) that the top squark decays to a b-quark in addition to an on-shell chargino whose decay occurs via a real or virtual W boson, or (ii) that the top squark decays to a t-quark and the lightest neutralino. A top squark with a mass between 150 GeV and 445 GeV decaying to a b-quark and an on-shell chargino is excluded at 95% confidence level for a top squark mass equal to the chargino mass plus 10 GeV, in the case of a 1 GeV lightest neutralino. Top squarks with masses between 215 (90) GeV and 530 (170) GeV decaying to an on-shell (off-shell) t-quark and a neutralino are excluded at 95% confidence level for a 1 GeV neutralino.
61 pages plus author list (84 pages total), 20 figures, 23 tables, submitted to JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2013-19/
References in corpus (17)
- PYTHIA 6.4 Physics and Manual
- Parton distributions for the LHC
- Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
- New parton distributions for collider physics
- Event generation with SHERPA 1.1
- Herwig++ Physics and Manual
- Implications of CTEQ global analysis for collider observables
- Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
- Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
- Single-top hadroproduction in association with a W boson
- The PDF4LHC Working Group Interim Recommendations
- Parton Distributions for LHC
- Measuring superparticle masses at hadron collider using the transverse mass kink
- Using Subsystem MT2 for Complete Mass Determinations in Decay Chains with Missing Energy at Hadron Colliders
- t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
- Supersymmetry production cross sections in pp collisions at sqrt{s} = 7 TeV
- Search for direct top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in sqrt(s) = 7 TeV pp collisions using 4.7 fb-1 of ATLAS data
Cited by in corpus (31)
- HistFitter software framework for statistical data analysis
- Search for pair-produced third-generation squarks decaying via charm quarks or in compressed supersymmetric scenarios in collisions at TeV with the ATLAS detector
- Search for top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in 8 TeV pp collisions with the ATLAS detector
- Searches for electroweak neutralino and chargino production in channels with Higgs, Z, and W bosons in pp collisions at 8 TeV
- Measurement of Spin Correlation in Top-Antitop Quark Events and Search for Top Squark Pair Production in pp Collisions at TeV Using the ATLAS Detector
- Discovery Prospects for NMSSM Higgs Bosons at the High-Energy Large Hadron Collider
- Searches for supersymmetry using the MT2 variable in hadronic events produced in pp collisions at 8 TeV
- Search for supersymmetry using razor variables in events with b-tagged jets in pp collisions at sqrt(s) = 8 TeV
- Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at sqrt(s) = 8 TeV
- Anatomy of Coannihilation with a Scalar Top Partner
- Search for physics beyond the standard model in events with two leptons, jets, and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV
- Closing the stop gap
- Natural SUSY in Plain Sight
- Testing Radiative Neutrino Mass Models at the LHC
- Electroweakino constraints from LHC data
- Towards precise predictions for Higgs-boson production in the MSSM
- Vector Fermion-Portal Dark Matter: Direct Detection and Galactic Center Gamma-Ray Excess
- LHC search for di-Higgs decays of stoponium and other scalars in events with two photons and two bottom jets
- Searches for supersymmetry based on events with b jets and four W bosons in pp collisions at 8 TeV
- Unbroken at a 100 TeV collider
- Spot the stop with a b-tag
- SModelS v1.0: a short user guide
- Consistency of the recent ATLAS excess in a simplified GGM model
- The Higgs Boson is found: What is next?
- Multi-tops at the LHC
- Auto-Concealment of Supersymmetry in Extra Dimensions
- Improving estimates of the number of fake leptons and other mis-reconstructed objects in hadron collider events: BoB's your UNCLE. (Previously "The Matrix Method Reloaded")
- Baryogenesis: A small review of the big picture
- The Status of Supersymmetry after the LHC Run 1
- Supersymmetry with a Heavy Lightest Supersymmetric Particle
- Searching for radiative neutrino mass generation at the LHC