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dc.contributor.author
Carmona, Adrián
dc.contributor.author
Goertz, Florian
dc.date.accessioned
2019-10-24T14:02:30Z
dc.date.available
2017-06-11T17:24:34Z
dc.date.available
2019-10-24T14:02:30Z
dc.date.issued
2015-05
dc.identifier.other
10.1007/JHEP05(2015)002
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/100830
dc.identifier.doi
10.3929/ethz-b-000100830
dc.description.abstract
We demonstrate that the inclusion of a realistic lepton sector can relax significantly the upper bound on top partner masses in minimal composite Higgs models, induced by the lightness of the Higgs boson. To that extend, we present a comprehensive survey of the impact of different realizations of the fermion sectors on the Higgs potential, with a special emphasis on the role of the leptons. The non-negligible compositeness of the τ R in a general class of models that address the flavor structure of the lepton sector and the smallness of the corresponding FCNCs, can have a significant effect on the potential. We find that, with the τ R in the symmetric representation of SO(5), an increase in the maximally allowed mass of the lightest top partner of ≳ 1 TeV is possible for minimal quark setups like the MCHM5,10, without increasing the tuning. A light Higgs boson m H ∼ (100−200) GeV is a natural prediction of such models, which thus provide a new setup that can evade ultralight top partners without ad-hoc tuning in the Higgs mass. Moreover, we advocate a more minimal realization of the lepton sector than generally used in the literature, which still can avoid light partners due to its contributions to the Higgs mass in a different and very natural way, triggered by the seesaw mechanism. This allows to construct the most economical SO(5)/SO(4) composite Higgs models possible. Using both a transparent 4D approach, as well as presenting numerical results in the 5D holographic description, we demonstrate that, including leptons, minimality and naturalness do not imply light partners. Leptonic effects, not considered before, could hence be crucial for the viability of composite models.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Beyond Standard Model
en_US
dc.subject
Heavy Quark Physics
en_US
dc.subject
Technicolor and Composite Models
en_US
dc.title
A naturally light Higgs without light top partners
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2015-05-04
ethz.journal.title
Journal of High Energy Physics
ethz.journal.volume
2015
en_US
ethz.journal.issue
5
en_US
ethz.pages.start
2
en_US
ethz.size
63 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
001934172
ethz.publication.place
Berlin
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-11T17:25:13Z
ethz.source
ECIT
ethz.identifier.importid
imp5936532b6b0b737932
ethz.ecitpid
pub:158339
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T18:21:12Z
ethz.rosetta.lastUpdated
2019-10-24T14:02:51Z
ethz.rosetta.versionExported
true
ethz.COinS
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