A Comparative Study of Contributions to $ε_K$ in the RS Model

Details A Comparative Study of Contributions to $ε_K$ in the RS Model A Comparative Study of Contributions to $ε_K$ in the RS Model

2009-12-21

arxiv.org/abs/0912.4208v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 5 figures. Extended discussion, references added, typos corrected

Scientific paper

We contrast the impact of Higgs mediated flavor changing neutral currents on epsilon_K in the framework of a warped extra dimension that was recently calculated by Azatov et al. with the older results for Kaluza-Klein gluon induced corrections to that observable. We find that the most stringent constraint on the KK scale for a Higgs field localized on the infrared brane for reasonable additional assumptions comes from KK gluon exchange. In the case of a bulk Higgs field we show that for certain scenarios the Higgs contribution can in fact exceed the KK gluon contribution. In the course of this analysis we also describe in detail the different renormalization procedures that have to be employed in the KK gluon and Higgs cases to relate the new physics at high energies to low energy observables.

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