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Warped Extra Dimensions: Flavor, Precision Tests and Higgs Physics | | Florian Goertz
; | | Date: |
29 Dec 2011 | | Abstract: | In this thesis, the phenomenology of the Randall-Sundrum setup is
investigated. In this context models with and without an enlarged SU(2)_L x
SU(2)_R x U(1)_X x P_{LR} gauge symmetry, which removes corrections to the T
parameter and to the Z b_L ar b_L coupling, are compared with each other. The
Kaluza-Klein decomposition is formulated within the mass basis, which allows
for a clear understanding of various model-specific features. A complete
discussion of tree-level flavor-changing effects is presented. Exact
expressions for five dimensional propagators are derived, including Yukawa
interactions that mediate flavor-off-diagonal transitions. The symmetry that
reduces the corrections to the left-handed Z b ar b coupling is analyzed in
detail. In the literature, Randall-Sundrum models have been used to address the
measured anomaly in the t ar t forward-backward asymmetry. However, it will
be shown that this is not possible within a natural approach to flavor. The
rare decays t o cZ and t o ch are investigated, where in particular the
latter could be observed at the LHC. A calculation of Gamma_{12}^{B_s} in the
presence of new physics is presented. It is shown that the Randall-Sundrum
setup allows for an improved agreement with measurements of A_{SL}^s,
S_{psiphi}, and DeltaGamma_s. For the first time, a complete one-loop
calculation of all relevant Higgs-boson production and decay channels in the
custodial Randall-Sundrum setup is performed, revealing a sensitivity to large
new-physics scales at the LHC. | | Source: | arXiv, 1112.6387 | | Services: | Forum | Review | PDF | Favorites | |
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