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ATLAS Sensitivity to Leptoquarks with Early LHC Data at 14 TeV Center of Mass Energy

Vikas Bansal, University of Victoria

Final states with high-pT leptons and jets are predicted by many Beyond the Standard Model (BSM) scenarios including leptoquarks, Left-Right Symmetry, various implementations of Grand Unification Theory (GUT), and other models. Such theoretical models extend the application of Quantum Field Theory to energies far above the Electroweak Symmetry Breaking (EWSB) energy scale and seek to provide a much more elegant and symmetric description of the fundamental forces. The implications of such models include possible answers to the origins of flavor, CP violation, baryogenesis, and other fundamental questions beyond EWSB. This work describes the study of leptoquarks in dilepton-jets final states in proton-proton collisions at a center of mass energy of 14 TeV using ATLAS apparatus at the Large Hadron Collider at CERN. The presented analysis is based on fully-simulated data samples that contain two or more high-pT lepton candidates and jets for an integrated luminosity of 100 / pb . Signal event selection, analysis algorithms, and suppression of SM backgrounds are discussed. ATLAS can discover leptoquarks up to masses of 565 GeV at 100 / pb for a branching ratio = 1 at a 5 sigma significance level.

Thursday, 26 November, 2009 - 15:30
Seminar Location: 
Pavillon RJA Levesque, salle 104
Refreshments Time and Location: 
café et biscuits à 15h00, au V-221

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