Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 41: B-Quarks

T 41.2: Vortrag

Mittwoch, 17. März 2010, 14:15–14:30, HG ÜR 7

Studies of Rare Di-muon B-Decays at the ATLAS Experiment* — •Valentin Sipica, Peter Buchholz, and Wolfgang Walkowiak — Universität Siegen, Fachbereich Physik

The B_s⁰ → µ⁺µ⁻ decay is allowed in the Standard Model only through one loop penguin or box diagrams, which are very sensitive to Standard Model extensions. Therefore, it is an excellent probe for New Physics effects. The LHC will be an abundant source of B mesons, allowing for the first time to set an upper limit on the branching ratio, with a sensitivity in the order of the Standard Model prediction (BR ∼ 3.5 · 10⁻⁹).

The strategy for the search of the B_s⁰ → µ⁺µ⁻ decay is presented, with the focus on a cut based analysis. Variables introduced in order to separate signal from background events are discussed and preliminary results are presented using simulated data.

* Gefördert durch BMBF