Abstract
The Standard Model of elementary particles is remarkably succesful in describing experimental data. The Higgs mechanism as the origin of electroweak symmetry breaking and mass generation, however, has not yet been confirmed experimentally. The search for the Higgs boson is thus one of the most important tasks of the ATLAS experiment at the Large Hadron Collider (LHC). This talk will present an overview of the potential of the ATLAS detector for the discovery of the Standard Model Higgs boson. Different production processes and decay channels -to cover a wide mass range- will be discussed.
Highlights
With large rapidity gap and high invariant mass ● Jet activity suppressed in central part of the detector → Central Jet Veto ● Large discrepancies between generators
→ ttH has disappeared from latest sensitivity plots!
● Strong effort has been put in studying data driven methods to become less dependent on Monte Carlo generators
Summary
Studies presented here: - Realistic (at least we believe ...) GEANT4 based detector description simulation - Real reconstruction algorithms - Trigger simulation - Effects of additional minimum bias events (Pile-Up), misalignment etc. studied - Improved generators (NLO etc.) - Background estimation from data in many cases. Studied - Improved generators (NLO etc.) - Background estimation from data in many cases. Studies presented here: - Realistic (at least we believe ...) GEANT4 based detector description simulation - Real reconstruction algorithms - Trigger simulation - Effects of additional minimum bias events (Pile-Up), misalignment etc. Focus in this talk: Discovery potential in the low and medium mass range (mH ≤ 200 GeV) @ √s = 14 TeV. ≈ 50% of events: at least 1 photon conversion → reconstruct from e+, e- tracks in Inner Detector mH mH. Inclusive (ask for photons only) analysis: γγ + 1,2 jet analyses (enhance VBF): 10 fb-1. With large rapidity gap and high invariant mass ● Jet activity suppressed in central part of the detector → Central Jet Veto ● Large discrepancies between generators
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