Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/119501
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Type: | Journal article |
Title: | Exploring fine-tuning of the Next-to-Minimal Composite Higgs Model |
Author: | Murnane, D. White, M. Williams, A.G. |
Citation: | The Journal of High Energy Physics, 2019; 2019(4):076-1-076-26 |
Publisher: | Springer Nature |
Issue Date: | 2019 |
ISSN: | 1126-6708 1029-8479 |
Statement of Responsibility: | Daniel Murnane, Martin White and Anthony G. Williams |
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 Z₂ symmetry that stabilises the scalar is amongst the most natural solutions in the parameter space, regardless of future collider measurements. |
Keywords: | Beyond standard model; technicolor and composite models; effective field theories; global symmetries |
Rights: | Open Access, © The Authors. Article funded by SCOAP³. |
DOI: | 10.1007/JHEP04(2019)076 |
Grant ID: | http://purl.org/au-research/grants/arc/FT140100244 http://purl.org/au-research/grants/arc/CE1101004 |
Published version: | http://dx.doi.org/10.1007/jhep04(2019)076 |
Appears in Collections: | Aurora harvest 8 Physics publications |
Files in This Item:
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hdl_119501.pdf | Published version | 3.86 MB | Adobe PDF | View/Open |
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