002801008 001__ 2801008
002801008 005__ 20240219045359.0
002801008 0248_ $$aoai:cds.cern.ch:2801008$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002801008 0247_ $$2DOI$$9Springer$$a10.1007/JHEP05(2022)140
002801008 0247_ $$2DOI$$9arXiv$$a10.1007/JHEP05(2022)140$$qpublication
002801008 037__ $$9arXiv$$aarXiv:2202.01228$$chep-ph
002801008 037__ $$9arXiv:reportnumber$$aCERN-TH-2022-012
002801008 035__ $$9arXiv$$aoai:arXiv.org:2202.01228
002801008 035__ $$9Inspire$$aoai:inspirehep.net:2026467$$d2024-02-18T21:27:54Z$$h2024-02-19T03:05:18Z$$mmarcxml$$ttrue$$uhttps://inspirehep.net/api/oai2d
002801008 035__ $$9Inspire$$a2026467
002801008 041__ $$aeng
002801008 100__ $$aDurieux, Gauthier$$jORCID:0000-0001-7272-6490$$mgauthier.durieux@cern.ch$$tGRID:grid.9132.9$$uCERN$$vTheoretical Physics Department, CERN, Esplanade des Particules 1, CH-1211 Geneva, Switzerland
002801008 245__ $$9arXiv$$aGegenbauer's Twin
002801008 269__ $$c2022-02-02
002801008 260__ $$c2022-05-20
002801008 300__ $$a7 p
002801008 500__ $$9arXiv$$a7 pages, 2 figures; v2: minor changes and added Figure 1, matches
published version
002801008 520__ $$9Springer$$aIn Twin Higgs models the dominant source of fine-tuning is the cancellation of order v$^{2}$/f$^{2}$ required to obtain a Standard Model-like Higgs, where v and f are the electroweak and new physics scales, respectively. Recently proposed Gegenbauer Goldstone models naturally realise v$^{2}$/f$^{2}$ « 1 and hence remove this source of fine-tuning. By combining the two into ‘Gegenbauer’s Twin’, we obtain a symmetry-based model for Higgs-sector naturalness consistent with current collider measurements without fine-tuning of parameters. Single-Higgs coupling deviations of a few percent and trilinear self-coupling deviations of order one are irreducible in the natural parameter space. Thus, notably, the fingerprints of Gegenbauer’s Twin could emerge first through di-Higgs measurements at the High-Luminosity LHC.
002801008 520__ $$9arXiv$$aIn Twin Higgs models the dominant source of fine-tuning is the cancellation of order $v^2/f^2$ required to obtain a Standard Model-like Higgs, where $v$ and $f$ are the electroweak and new physics scales, respectively. Recently proposed Gegenbauer Goldstone models naturally realise $v^2/f^2 \ll 1$ and hence remove this source of fine-tuning. By combining the two into `Gegenbauer's Twin', we obtain a symmetry-based model for Higgs sector naturalness consistent with current collider measurements without fine-tuning of parameters. Single-Higgs coupling deviations of a few percent and trilinear self-coupling deviations of order one are irreducible in the natural parameter space. Thus, notably, the fingerprints of Gegenbauer's Twin could emerge first through di-Higgs measurements at the High-Luminosity LHC.
002801008 540__ $$3preprint$$aCC-BY-4.0$$uhttp://creativecommons.org/licenses/by/4.0/
002801008 540__ $$3publication$$aCC-BY-4.0$$bSpringer$$fSCOAP3$$uhttp://creativecommons.org/licenses/by/4.0/
002801008 542__ $$3publication$$f© The Authors
002801008 595_D $$aZ$$d2022-02-09$$sabs
002801008 595_D $$aZ$$d2022-02-15$$sprinted
002801008 595__ $$aCERN-TH
002801008 595__ $$a37 combined refs (0 IDs differ, 22 IDs coincide, 14 DOIs/1 bulls added from SISSA, 0 IDs missing in SISSA)
002801008 595__ $$aDOKIFILE:jhep2205.142-2130
002801008 65017 $$2arXiv$$ahep-ex
002801008 65017 $$2SzGeCERN$$aParticle Physics - Experiment
002801008 65017 $$2arXiv$$ahep-ph
002801008 65017 $$2SzGeCERN$$aParticle Physics - Phenomenology
002801008 690C_ $$aCERN
002801008 690C_ $$aARTICLE
002801008 700__ $$aMcCullough, Matthew$$mmatthew.mccullough@cern.ch$$tGRID:grid.9132.9$$uCERN$$vTheoretical Physics Department, CERN, Esplanade des Particules 1, CH-1211 Geneva, Switzerland
002801008 700__ $$aSalvioni, Ennio$$jORCID:0000-0002-2173-5116$$mennio.salvioni@unipd.it$$tGRID:grid.470212.2$$uU. Padua, Dept. Phys. Astron.$$uINFN, Padua$$vDipartimento di Fisica e Astronomia, Università di Padova and INFN, Sezione di Padova, Via Marzolo 8, I-35131 Padua, Italy
002801008 773__ $$c140$$pJHEP$$v2205$$y2022
002801008 8564_ $$82349519$$s11672$$uhttp://cds.cern.ch/record/2801008/files/geg-twin-tun-tri.png$$y00004 {\it (Left)} Ratio of the Higgs trilinear self-coupling to its SM expectation. {\it (Right)} Contours indicating the total fine-tuning $\Delta$ and the $c_{hhh}/c_{hhh}^\text{SM}$ coupling deviation in the plane of input parameters $\{ f, n \}$. We do not consider the region in the upper-left corner where the first minimum is not the global one.
002801008 8564_ $$82349520$$s21599$$uhttp://cds.cern.ch/record/2801008/files/geg-twin-tun-vs-f.png$$y00001 {\it (Left)} Total fine-tuning of Gegenbauer's Twin for different spurion index $n$, as a function of the symmetry breaking scale $f$. For comparison, we also show the composite Twin Higgs model of \cite{Barbieri:2015lqa} (denoted Y-Twin), where the $\mathcal{Z}_2$ breaking arises from not gauging the Twin hypercharge. The dashed line shows the $n$-independent $({\partial \log v^2}/{\partial \log a})^{-1}$ contribution that dominates the tuning of Gegenbauer's Twin. {\it (Right)} Ratio of the tuning of Gegenbauer's Twin and Y-Twin models to the naive $2 v^2/f^2$ estimate expected for the latter.
002801008 8564_ $$82349521$$s593913$$uhttp://cds.cern.ch/record/2801008/files/2202.01228.pdf$$yFulltext
002801008 8564_ $$82349522$$s10273$$uhttp://cds.cern.ch/record/2801008/files/geg-twin-tri.png$$y00003 {\it (Left)} Ratio of the Higgs trilinear self-coupling to its SM expectation. {\it (Right)} Contours indicating the total fine-tuning $\Delta$ and the $c_{hhh}/c_{hhh}^\text{SM}$ coupling deviation in the plane of input parameters $\{ f, n \}$. We do not consider the region in the upper-left corner where the first minimum is not the global one.
002801008 8564_ $$82349523$$s10884$$uhttp://cds.cern.ch/record/2801008/files/geg-twin-tun-vs-v2of2.png$$y00002 {\it (Left)} Total fine-tuning of Gegenbauer's Twin for different spurion index $n$, as a function of the symmetry breaking scale $f$. For comparison, we also show the composite Twin Higgs model of \cite{Barbieri:2015lqa} (denoted Y-Twin), where the $\mathcal{Z}_2$ breaking arises from not gauging the Twin hypercharge. The dashed line shows the $n$-independent $({\partial \log v^2}/{\partial \log a})^{-1}$ contribution that dominates the tuning of Gegenbauer's Twin. {\it (Right)} Ratio of the tuning of Gegenbauer's Twin and Y-Twin models to the naive $2 v^2/f^2$ estimate expected for the latter.
002801008 8564_ $$82369985$$s415736$$uhttp://cds.cern.ch/record/2801008/files/document.pdf$$yFulltext
002801008 8564_ $$82370154$$s10128$$uhttp://cds.cern.ch/record/2801008/files/geg-twin-potential.png$$y00000 Full Gegenbauer's Twin potential $V=V_t+V_G^{(n)}$ for $n=6, 8$ and $f=1\,$TeV. Dashed lines show the top-sector component $V_t$. Parameters are fixed so as to reproduce the physical Higgs mass and vev in the first minimum.
002801008 960__ $$a13
002801008 980__ $$aARTICLE