Berlin 2005 – wissenschaftliches Programm

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T: Teilchenphysik

T 607: Higgs III

T 607.3: Vortrag

Dienstag, 8. März 2005, 17:00–17:15, TU H2037

Search for supersymmetric neutral Higgs bosons in the decay channel A/H → µ⁺ µ⁻ in the ATLAS detector — •Georgios Dedes, Nectarios Benekos, Sandra Horvat, Oliver Kortner, Serguei Kotov, and Hubert Kroha — Max-Planck-Institut für Physik, München

The Minimal Supersymmetric Standard Model predicts the existence of five Higgs bosons (h, H, A and H^±) whose masses are determined by two independent parameters: the ratio tan β of the two vacuum expectation values and the pseudoscalar Higgs boson mass m_A. Motivated by a high muon momentum resolution and identification efficiency achievable with the ATLAS detector at the Large Hadron Collider, we explore the observability of A → µ⁺ µ⁻ and H → µ⁺ µ⁻ signatures in the detector. Even though strongly enhanced compared to the Standard Model Higgs boson decays into two muons, these processes are hidden under a large Z→ µ⁺ µ⁻ background. The detection of b-jets originating from the gg → bbA/H production processes provides a strong background rejection. In addition, we optimize the suppression of background processes with b-jets in the final state.