Search for first generation scalar leptoquarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

Abstract

We report a search for first generation scalar leptoquarks using 1.03 fb^-1 of proton-proton collisions data produced by the Large Hadron Collider at sqrt(s)=7 TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses m_LQ < 660 (607) GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).

8 pages plus author list (20 pages total), 5 figures, 1 table, corrected author list

References in corpus (5)

• PYTHIA 6.4 Physics and Manual
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Event generation with SHERPA 1.1
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS

Cited by in corpus (37)

• Physics of leptoquarks in precision experiments and at particle colliders
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• The Leptoquark Hunter's Guide: Pair Production
• Search for scalar leptoquarks in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS experiment
• Searches for scalar leptoquarks in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Pair Production of Scalar Leptoquarks at the LHC to NLO Parton Shower Accuracy
• Lepton number violation at the LHC with leptoquark and diquark
• Probing Nonstandard Standard Model Backgrounds with LHC Monojets
• Heavy and light scalar leptoquarks in proton decay
• Single Productions of Colored Particles at the LHC: An Example with Scalar Leptoquarks
• Search for pair production of first- and second-generation scalar leptoquarks in pp collisions at sqrt(s) = 7 TeV
• Search for second generation scalar leptoquarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Interpreting the $R_{K^{(\ast )}}$ Anomaly in the Colored Zee-Babu Model
• Search for pair production of first and second generation leptoquarks in proton-proton collisions at sqrt(s) = 8 TeV
• Searches for scalar leptoquarks and differential cross-section measurements in dilepton-dijet events in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV with the ATLAS experiment
• Testing Radiative Neutrino Mass Models at the LHC
• Model independent constraints on leptoquarks from b -> s l+ l- processes
• E6 inspired SUSY models with exact custodial symmetry
• "L=R" -- $U(1{)}_R$ Lepton Number at the LHC
• Spontaneous R-Parity Breaking, Stop LSP Decays and the Neutrino Mass Hierarchy
• Color Breaking in the Early Universe
• Search for the lepton-flavour violating decays $B_s^0\to e^{\pm }{\mu }^{\mp }$ and $B^0\to e^{\pm }{\mu }^{\mp }$
• The Leptoquark Implication from the CMS and IceCube Experiments
• NLO Leptoquark Production and Decay: The Narrow-Width Approximation and Beyond
• Search for first-generation leptoquarks at HERA
• LSP Squark Decays at the LHC and the Neutrino Mass Hierarchy
• Three-generation baryon and lepton number violation at the LHC
• Is the 125 GeV Higgs the superpartner of a neutrino?
• Bounds on R-parity Violation from Resonant Slepton Production at the LHC
• Charged Lepton Flavor Violating Processes and Scalar Leptoquark Decay Branching Ratios in the Colored Zee-Babu Model
• Search for lepton flavour violation in the emu continuum with the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC
• Signatures of Leptoquarks at the LHC and Right-handed Neutrinos
• Stop and Sbottom LSP with R-parity Violation
• Supersymmetry with a Sister Higgs
• Do leptoquarks manifest themselves in ultra-high energy neutrino interactions?
• Phenomenology of Colored Radiative Neutrino Mass Model and Its Implications on the Cosmic-ray Observations
• Exotic colored scalars at the LHC