Minimal Composite Higgs Models at the LHC
Abstract
We consider composite Higgs models where the Higgs is a pseudo-Nambu Goldstone boson arising from the spontaneous breaking of an approximate global symmetry by some underlying strong dynamics. We focus on the SO(5) → SO(4) symmetry breaking pattern, assuming the “partial compositeness” paradigm. We study the consequences on Higgs physics of the fermionic representations produced by the strong dynamics, that mix with the Standard Model (SM) degrees of freedom. We consider models based on the lowest-dimensional representations of SO(5) that allow for the custodial protection of the Z b ¯ b coupling, i.e. the 5, 10 and 14. We find a generic suppression of the gluon fusion process, while the Higgs branching fractions can be enhanced or suppressed compared to the SM. Interestingly, a precise measurement of the Higgs boson couplings can distinguish between different realizations in the fermionic sector, thus providing crucial information about the nature of the UV dynamics.
- Authors:
-
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States). Enrico Fermi Inst.; Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)
- CONICET, Centro Atomico Bariloche and Inst. Balseiro (Argentina)
- Univ. Estadual Paulista, Sao Paulo (Brazil). ICTP South American Inst. for Fundamental Research and Inst. de Fisica Teorica
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1156500
- Report Number(s):
- FERMILAB-PUB-14-271-T
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1402.2987
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2014; Journal Issue: 6; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Carena, Marcela, Da Rold, Leandro, and Pontón, Eduardo. Minimal Composite Higgs Models at the LHC. United States: N. p., 2014.
Web. doi:10.1007/JHEP06(2014)159.
Carena, Marcela, Da Rold, Leandro, & Pontón, Eduardo. Minimal Composite Higgs Models at the LHC. United States. https://doi.org/10.1007/JHEP06(2014)159
Carena, Marcela, Da Rold, Leandro, and Pontón, Eduardo. Thu .
"Minimal Composite Higgs Models at the LHC". United States. https://doi.org/10.1007/JHEP06(2014)159. https://www.osti.gov/servlets/purl/1156500.
@article{osti_1156500,
title = {Minimal Composite Higgs Models at the LHC},
author = {Carena, Marcela and Da Rold, Leandro and Pontón, Eduardo},
abstractNote = {We consider composite Higgs models where the Higgs is a pseudo-Nambu Goldstone boson arising from the spontaneous breaking of an approximate global symmetry by some underlying strong dynamics. We focus on the SO(5) → SO(4) symmetry breaking pattern, assuming the “partial compositeness” paradigm. We study the consequences on Higgs physics of the fermionic representations produced by the strong dynamics, that mix with the Standard Model (SM) degrees of freedom. We consider models based on the lowest-dimensional representations of SO(5) that allow for the custodial protection of the Z b ¯ b coupling, i.e. the 5, 10 and 14. We find a generic suppression of the gluon fusion process, while the Higgs branching fractions can be enhanced or suppressed compared to the SM. Interestingly, a precise measurement of the Higgs boson couplings can distinguish between different realizations in the fermionic sector, thus providing crucial information about the nature of the UV dynamics.},
doi = {10.1007/JHEP06(2014)159},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2014,
place = {United States},
year = {Thu Jun 26 00:00:00 EDT 2014},
month = {Thu Jun 26 00:00:00 EDT 2014}
}
Web of Science
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