Constraints on vector resonances from a strong Higgs sector

Abstract

We consider a scenario of a composite Higgs arising from a strong sector. We assume that the lowest lying composite states are the Higgs scalar doublet and a massive vector triplet, whose dynamics below the compositeness scale are described in terms of an effective Lagrangian. Electroweak symmetry breaking takes place through a vacuum expectation value just as in the Standard Model, but with the vector resonances strongly coupled to the Higgs field. We determine the constraints on this scenario imposed by (i) the Higgs diphoton decay rate, (ii) the electroweak precision tests and (iii) searches of heavy resonances at the LHC in the final states $l^{+}{l}^{-}$ and $l{\nu }_l$ ($l=e,\mu$), ${\tau }^{+}{\tau }^{-}$, $jj$, $t\bar{t}$, $WZ$, $WW$, $WH$ and $ZH$. We find that the heavy vector resonances should have masses that are constrained to be in the range $2.1$ - $3$ TeV. On the other hand, the mixing of the heavy vectors with the Standard Model gauge bosons is constrained to be in the range $\tan \vartheta \sim 0.1-0.3$, which is consistent with the assumption that the Higgs couples weakly to the Standard sector, even though it couples strongly to the heavy vector resonances.

14 pages, 18 figures. arXiv admin note: text overlap with arXiv:1506.03631

References in corpus (17)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
• The Flavor of the Composite Pseudo-Goldstone Higgs
• Beyond the Minimal Composite Higgs Model
• Minimal Walking Technicolor: Set Up for Collider Physics
• Ultra Minimal Technicolor and its Dark Matter TIMP
• The Higgs boson from an extended symmetry
• Minimal Composite Higgs Models at the LHC
• Higgs $\to$ $\mu \tau$ as an indication for $S_4$ flavor symmetry
• Search for heavy resonances decaying to tau lepton pairs in proton-proton collisions at sqrt(s) = 13 TeV
• The Excitation of the Global Symmetry-Breaking Vacuum in Composite Higgs Models
• The Global Higgs as a Signal for Compositeness at the LHC
• A Composite Higgs Model with Minimal Fine-Tuning I.~The Large-N and Weak-technicolor Limit
• Constraining Spin-One Color-Octet Resonances Using CDF and ATLAS Data
• The limits on the strong Higgs sector parameters in the presence of new vector resonances