Heidelberg 2007 – scientific programme

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T: Fachverband Teilchenphysik

T 207: BSM Theorie I

T 207.2: Talk

Tuesday, March 6, 2007, 17:00–17:15, KIP SR 2.402

The Noncommutative Standard Model To Second Order: Ambguities and Observables — •Ana Alboteanu, Thorsten Ohl, and Reinhold Rückl — Institut für Theoretische Physik und Astrophysik, Universität Würzburg

The standard model on noncommutative space-time can be realised as effective theory by an expansion in powers of the noncommutative parameter $\theta/\Lambda^2_{NC}$. The central ingredient of the model are the Seiberg-Witten Maps, expressing noncommutative fields by their ordinary counterparts such that the noncommutative gauge invariance is realized by commutative gauge invariance. We study the neutral current sector of the noncommutative standard model in second order in $\theta/\Lambda^2_{NC}$ and analize the ambiguities of the Seiberg-Witten Maps and their nontrivial consequences for observables in the model.