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T: Fachverband Teilchenphysik
T 15: Flavorphysik (Theorie) 2
T 15.1: Vortrag
Mittwoch, 11. März 2009, 16:45–17:00, M001
Δ F=2 Observables and Fine-Tuning in a Warped Extra Dimension with Custodial Protection — Monika Blanke1,2, Andrzej Buras1, •Björn Duling1, Stefania Gori1,2, and Andreas Weiler3 — 1TU München, Physikdepartment, Garching — 2Max Planck Institut für Physik, München — 3Cornell University, Ithaca, NY
After a brief theoretical introduction of the warped extra-dimensional (WED) model with custodial protection the results of arXiv:0809.1073 are presented. In this work we analyze the impact of Kaluza-Klein (KK) gauge boson modes on Δ F=2 observables, for the first time considering the full operator basis and including NLO RG running. It is pointed out that the dominant contribution in the B-system does not come from the KK gluon, but that contributions from KK excitations of the weak gauge bosons are competitive. In a numerical analysis we assess the amount of fine tuning necessary for obtaining realistic values for quark masses and mixings and at the same time realistic values for єK, the measure for indirect CP violation in K meson mixing. We are able to show that a mass of the lightest KK gauge boson of 2-3 TeV, and hence in the reach of the LHC, is still possible for moderate fine tuning. These results enable us to predict ranges for not yet measured Δ F=2 observables, such as Sψφ and ASLs, which can differ significantly from their SM values.