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arXiv · 0901.4599

K and B meson mixing in warped extra dimensions with custodial protection

Bjoern Duling
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Abstract

After a brief theoretical introduction of the warped extra-dimensional model with custodial protection the results of arXiv:0809.1073 [hep-ph] are presented. In this work we analyze the impact of Kaluza-Klein (KK) gauge boson modes on Delta F=2 observables, for the first time considering the full operator basis and including NLO renormalization group 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 epsilon_K, the measure for 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 make predictions for not yet measured Delta F=2 observables, such as S_ψϕand A_s^SL, which can differ significantly from their SM values.

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Bjoern Duling. 2009-01-29. K and B meson mixing in warped extra dimensions with custodial protection. https://doi.org/10.1088/1742-6596/171/1/012061

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