The custodial Randall-Sundrum model: from precision tests to Higgs physics
We reexamine the Randall-Sundrum (RS) model with enlarged gauge symmetry SU(2) 1 × SU(2) r × U(1) x × P lr in the presence of a brane-localized Higgs sector. In contrast to the existing literature, we perform the Kaluza-Klein (KK) decomposition within the mass basis, which avoids the truncation of t...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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2010
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| _version_ | 1826257908746158080 |
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| author | Casagrande, S Goertz, F Haisch, U Neubert, M Pfoh, T |
| author_facet | Casagrande, S Goertz, F Haisch, U Neubert, M Pfoh, T |
| author_sort | Casagrande, S |
| collection | OXFORD |
| description | We reexamine the Randall-Sundrum (RS) model with enlarged gauge symmetry SU(2) 1 × SU(2) r × U(1) x × P lr in the presence of a brane-localized Higgs sector. In contrast to the existing literature, we perform the Kaluza-Klein (KK) decomposition within the mass basis, which avoids the truncation of the KK towers. Expanding the low-energy spectrum as well as the gauge couplings in powers of the Higgs vacuum expectation value, we obtain analytic formulas which allow for a deep understanding of the model-specific protection mechanisms of the T parameter and the left-handed Z-boson couplings. In particular, in the latter case we explain which contributions escape protection and identify them with the irreducible sources of P lr symmetry breaking. We furthermore show explicitly that no protection mechanism is present in the charged-current sector confirming existing model-independent findings. The main focus of the phenomenological part of our work is a detailed discussion of Higgs-boson couplings and their impact on physics at the CERN Large Hadron Collider. For the first time, a complete one-loop calculation of all relevant Higgs-boson production and decay channels is presented, incorporating the effects stemming from the extended electroweak gauge-boson and fermion sectors. © SISSA 2010. |
| first_indexed | 2024-03-06T18:25:38Z |
| format | Journal article |
| id | oxford-uuid:07db1277-4cf3-4803-83a8-d33309c22ff0 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:25:38Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:07db1277-4cf3-4803-83a8-d33309c22ff02022-03-26T09:09:49ZThe custodial Randall-Sundrum model: from precision tests to Higgs physicsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:07db1277-4cf3-4803-83a8-d33309c22ff0EnglishSymplectic Elements at Oxford2010Casagrande, SGoertz, FHaisch, UNeubert, MPfoh, TWe reexamine the Randall-Sundrum (RS) model with enlarged gauge symmetry SU(2) 1 × SU(2) r × U(1) x × P lr in the presence of a brane-localized Higgs sector. In contrast to the existing literature, we perform the Kaluza-Klein (KK) decomposition within the mass basis, which avoids the truncation of the KK towers. Expanding the low-energy spectrum as well as the gauge couplings in powers of the Higgs vacuum expectation value, we obtain analytic formulas which allow for a deep understanding of the model-specific protection mechanisms of the T parameter and the left-handed Z-boson couplings. In particular, in the latter case we explain which contributions escape protection and identify them with the irreducible sources of P lr symmetry breaking. We furthermore show explicitly that no protection mechanism is present in the charged-current sector confirming existing model-independent findings. The main focus of the phenomenological part of our work is a detailed discussion of Higgs-boson couplings and their impact on physics at the CERN Large Hadron Collider. For the first time, a complete one-loop calculation of all relevant Higgs-boson production and decay channels is presented, incorporating the effects stemming from the extended electroweak gauge-boson and fermion sectors. © SISSA 2010. |
| spellingShingle | Casagrande, S Goertz, F Haisch, U Neubert, M Pfoh, T The custodial Randall-Sundrum model: from precision tests to Higgs physics |
| title | The custodial Randall-Sundrum model: from precision tests to Higgs physics |
| title_full | The custodial Randall-Sundrum model: from precision tests to Higgs physics |
| title_fullStr | The custodial Randall-Sundrum model: from precision tests to Higgs physics |
| title_full_unstemmed | The custodial Randall-Sundrum model: from precision tests to Higgs physics |
| title_short | The custodial Randall-Sundrum model: from precision tests to Higgs physics |
| title_sort | custodial randall sundrum model from precision tests to higgs physics |
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