Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 56: Suche nach neuer Physik I
T 56.1: Vortrag
Montag, 28. März 2011, 16:45–17:00, 30.34: 022
The Global Electroweak Fit and Constraints on New Physics with Gfitter — Martin Goebel1,2, Johannes Haller3, •Dörthe Ludwig1,2, Klaus Mönig1, and Jörg Stelzer1 — 1DESY — 2Universität Hamburg — 3Universität Göttingen
The thourough investigation of radiative corrections allows to gain information on physics processes at higher energy scales than those directly accessible by current experiments. As a consequence, using electroweak precision measurements in conjunction with state-of-the-art SM predictions allows e.g. the estimation of a preferred mass range for the SM Higgs boson mass. Physics beyond the Standard Model can modify the relations between electroweak observables and their theoretical predictions. Such effects can be parametrized in terms of effective, so-called oblique parameters. A global fit of the electroweak SM, as performed with the Gfitter package, allows the determination of the oblique parameters and to probe physics models and to set constraints on their free parameters.
In this talk, the global electroweak fit including the most recent experimental results as well as the Gfitter results for the oblique parameters will be presented together with constraints on various new physics models, including extra dimension models and four generations.