Dortmund 2006 – scientific programme
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T: Teilchenphysik
T 702: Higgs III
T 702.1: Talk
Friday, March 31, 2006, 14:30–14:45, P1-02-323
Search for the Higgs boson in the associated production with W and decays W→ lνl and H→ b b in the ATLAS detector — •Jianming Yuan, Sandra Horvat, Oliver Kortner, Sergey Kotov, and Hubert Kroha — Max-Planck-Institut für Physik, München
The Standard Model predicts the existence of the Higgs boson with unknown mass, which is constrained by the LEP2 experiments to be greater than 114 GeV. With high-resolution measurements of electrons, muons and good secondary vertex detection for b-quark identification, the ATLAS detector at the Large Hadron Collider offers a good opportunity to explore the full range of possible Higgs boson masses. In this talk we explore the observability of Higgsstrahlung production in association with W boson with subsequent decay W→ lνl, H→ b b using the full ATLAS Monte-Carlo simulation. The detection of isolated trigger lepton and additional light jet veto can reduce the background contribution to the signal. The tt→ WWbb and Wjj background channels are reducible and can be suppressed by appropriate selection cuts. However, the extraction of a signal from H→ bb decay is difficult since there is a large irreducible background from WZ→ lνl b b and Wb b production.