Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/131512
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Type: | Journal article |
Title: | Convergent Bayesian global fits of 4D composite Higgs models |
Author: | Carragher, E. Handley, W. Murnane, D. Stangl, P. Su, W. White, M. Williams, A.G. |
Citation: | The Journal of High Energy Physics, 2021; 2021(5):1-77 |
Publisher: | Springer |
Issue Date: | 2021 |
ISSN: | 1029-8479 1029-8479 |
Statement of Responsibility: | Ethan Carragher, Will Handley, Daniel Murnane, Peter Stangl, Wei Su, Martin White, Anthony G. Williams |
Abstract: | Models in which the Higgs boson is a composite pseudo-Nambu-Goldstone boson offer attractive solutions to the Higgs mass naturalness problem. We consider three such models based on the minimal SO(5) → SO(4) symmetry breaking pattern, and perform convergent global fits on the models under a Bayesian framework in order to find the regions of their parameter spaces that best fit a wide range of constraints, including recent Higgs measurements. We use a novel technique to analyse the fine-tuning of the models, quantifying the tuning as the Kullback-Leibler divergence from the prior to the posterior probability on the parameter space. Each model is found to be able to satisfy all constraints at the 3σ level simultaneously. As a by-product of the fits, we analyse the collider phenomenology of our models in these viable regions. In two of the three models, we find that the gg → H → γγ cross section is less than ∼90% that predicted by the SM, which is already in slight tension with experiment and could potentially be ruled out in the future high-luminosity run of the LHC. In addition, the lightest fermions F arising from the new strong dynamics in these models are seen in general to lie above ∼1.1 TeV, with the F → tW+ and F → b¯¯W+ decays offering particularly promising channels for probing these models in future collider searches. |
Keywords: | Supersymmetry Phenomenology |
Rights: | Open Access, © The Authors. Article funded by SCOAP3. |
DOI: | 10.1007/JHEP05(2021)237 |
Grant ID: | http://purl.org/au-research/grants/arc/DP180102209 http://purl.org/au-research/grants/arc/CE200100008 |
Published version: | http://dx.doi.org/10.1007/jhep05(2021)237 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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hdl_131512.pdf | 30.3 MB | Adobe PDF | View/Open |
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