Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model
Abstract We perform a detailed study of the fine-tuning of the two-site, 4D, Next-to-Minimal Composite Higgs Model (NMCHM), based on the global symmetry breaking pattern SO(6) → SO(5). Using our previously-defined fine-tuning measure that correctly combines the effect of multiple sources of fine-tun...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-04-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP04(2019)076 |
| _version_ | 1819064356197892096 |
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| author | Daniel Murnane Martin White Anthony G. Williams |
| author_facet | Daniel Murnane Martin White Anthony G. Williams |
| author_sort | Daniel Murnane |
| collection | DOAJ |
| description | Abstract We perform a detailed study of the fine-tuning of the two-site, 4D, Next-to-Minimal Composite Higgs Model (NMCHM), based on the global symmetry breaking pattern SO(6) → SO(5). Using our previously-defined fine-tuning measure that correctly combines the effect of multiple sources of fine-tuning, we quantify the fine-tuning that is expected to result from future collider measurements of the Standard Model-like Higgs branching ratios, in addition to null searches for the new resonances in the model. We also perform a detailed comparison with the Minimal Composite Higgs Model, finding that there is in general little difference between the fine-tuning expected in the two scenarios, even after measurements at a high-luminosity, 1 TeV linear collider. Finally, we briefly consider the relationship between fine-tuning and the ability of the extra scalar in the NMCHM model to act as a dark matter candidate, finding that the realisation of a Z 2 symmetry that stabilises the scalar is amongst the most natural solutions in the parameter space, regardless of future collider measurements. |
| first_indexed | 2024-12-21T15:29:16Z |
| format | Article |
| id | doaj.art-490182a443314b05bac36a3340fb2e36 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-21T15:29:16Z |
| publishDate | 2019-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-490182a443314b05bac36a3340fb2e362022-12-21T18:58:48ZengSpringerOpenJournal of High Energy Physics1029-84792019-04-012019412710.1007/JHEP04(2019)076Exploring fine-tuning of the Next-to-Minimal Composite Higgs ModelDaniel Murnane0Martin White1Anthony G. Williams2ARC Centre of Excellence for Particle Physics at the Terascale, Department of Physics, University of AdelaideARC Centre of Excellence for Particle Physics at the Terascale, Department of Physics, University of AdelaideARC Centre of Excellence for Particle Physics at the Terascale, Department of Physics, University of AdelaideAbstract We perform a detailed study of the fine-tuning of the two-site, 4D, Next-to-Minimal Composite Higgs Model (NMCHM), based on the global symmetry breaking pattern SO(6) → SO(5). Using our previously-defined fine-tuning measure that correctly combines the effect of multiple sources of fine-tuning, we quantify the fine-tuning that is expected to result from future collider measurements of the Standard Model-like Higgs branching ratios, in addition to null searches for the new resonances in the model. We also perform a detailed comparison with the Minimal Composite Higgs Model, finding that there is in general little difference between the fine-tuning expected in the two scenarios, even after measurements at a high-luminosity, 1 TeV linear collider. Finally, we briefly consider the relationship between fine-tuning and the ability of the extra scalar in the NMCHM model to act as a dark matter candidate, finding that the realisation of a Z 2 symmetry that stabilises the scalar is amongst the most natural solutions in the parameter space, regardless of future collider measurements.http://link.springer.com/article/10.1007/JHEP04(2019)076Beyond Standard ModelTechnicolor and Composite ModelsEffective Field TheoriesGlobal Symmetries |
| spellingShingle | Daniel Murnane Martin White Anthony G. Williams Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model Journal of High Energy Physics Beyond Standard Model Technicolor and Composite Models Effective Field Theories Global Symmetries |
| title | Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model |
| title_full | Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model |
| title_fullStr | Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model |
| title_full_unstemmed | Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model |
| title_short | Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model |
| title_sort | exploring fine tuning of the next to minimal composite higgs model |
| topic | Beyond Standard Model Technicolor and Composite Models Effective Field Theories Global Symmetries |
| url | http://link.springer.com/article/10.1007/JHEP04(2019)076 |
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