Minimal Composite Higgs Models at the LHC

Carena, Marcela; Da Rold, Leandro; Pontón, Eduardo

doi:10.1007/JHEP06(2014)159

Title: Minimal Composite Higgs Models at the LHC

Journal Article · Thu Jun 26 00:00:00 EDT 2014 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP06(2014)159· OSTI ID:1156500

Carena, Marcela ^[1]; Da Rold, Leandro ^[2]; Pontón, Eduardo ^[3]

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

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.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1156500

Report Number(s):: FERMILAB-PUB-14-271-T; arXiv eprint number arXiv:1402.2987

Journal Information:: Journal of High Energy Physics (Online), Vol. 2014, Issue 6; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 54 works

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