Anatomy of a composite Higgs model

Dugan, Michael J.; Georgi, Howard; Kaplan, David B.

doi:10.1016/0550-3213(85)90221-4

Cited by 556 publications

(702 citation statements)

References 19 publications

Supporting

Mentioning

695

Contrasting

Order By: Relevance

“…Explicit models of composite Higgs have been put forward starting with the pioneering work of refs. [9,10]. This class of models can be best analyzed within the framework of the electroweak chiral Lagrangian with a light singlet Higgs state [11][12][13][14].…”

Section: Jhep02(2016)011 1 Introductionmentioning

confidence: 99%

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Chien

Cirigliano

Dekens

et al. 2016

J. High Energ. Phys.

117

View full text Add to dashboard Cite

Abstract:We investigate direct and indirect constraints on the complete set of anomalous CP-violating Higgs couplings to quarks and gluons originating from dimension-6 operators, by studying their signatures at the LHC and in electric dipole moments (EDMs). We show that existing uncertainties in hadronic and nuclear matrix elements have a significant impact on the interpretation of EDM experiments, and we quantify the improvements needed to fully exploit the power of EDM searches. Currently, the best bounds on the anomalous CP-violating Higgs interactions come from a combination of EDM measurements and the data from LHC Run 1. We argue that Higgs production cross section and branching ratios measurements at the LHC Run 2 will not improve the constraints significantly. On the other hand, the bounds on the couplings scale roughly linearly with EDM limits, so that future theoretical and experimental EDM developments can have a major impact in pinning down interactions of the Higgs.

show abstract

Section: Jhep02(2016)011 1 Introductionmentioning

confidence: 99%

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Chien

Cirigliano

Dekens

et al. 2016

J. High Energ. Phys.

117

View full text Add to dashboard Cite

show abstract

“…In the original basis the couplings are diagrammatically understood from the same diagrams as in the light fourplet case, except for the Z coupling which receives an additional contribution from the d µ term, leading to the second diagram on the right-hand side of figure 1(c). The couplings take the form 26) with the effective mixing angle…”

Section: Generic Partially Composite Casementioning

confidence: 99%

“…In this paper we transpose the logic of ref. [20] and item (i) above in the context of minimal CHMs where the Higgs doublet is realized as a pseudo-Nambu-Goldstone-boson (pNGB) [21][22][23][24][25][26][27][28][29] (see also [30]). In particular we address the question of how light can the first and second generation quark partners be without assuming degenerate compositeness parameters.…”

Section: Jhep02(2014)055mentioning

confidence: 99%

Light non-degenerate composite partners at the LHC

Delaunay

Flacke

González-Fraile

et al. 2014

J. High Energ. Phys.

View full text Add to dashboard Cite

Abstract:We study the phenomenological implications of a large degree of compositeness for the light generation quarks in composite pseudo-Nambu-Goldstone-boson Higgs models. We focus in particular on phenomenologically viable scenarios where the right-handed uptype quarks have a sizable mixing with the strong dynamics. For concreteness we assume the latter to be characterized by an SO(5)/SO(4) symmetry with fermionic resonances in the SO(4) singlet and fourplet representations. Singlet partners dominantly decay to a Higgs boson and jets. Since no dedicated searches are currently looking for these final states, singlet partners can still be rather light. Conversely, some fourplet partner components dominantly decay to an electroweak gauge boson and a jet, a type of signature which has been analysed at the LHC. We have reinterpreted various ATLAS and CMS analyses in order to constrain the parameter space of this class of models. In the limit of first two generation degeneracy, as in minimal flavor violation or U(2)-symmetric flavor models, fourplet partners need to be relatively heavy, with masses above 1.8 TeV, or the level of compositeness needs to be rather small. The situation is significantly different in models which deviate from the first two generation degeneracy paradigm, as charm quark parton distribution functions are suppressed relative to the up quark ones. We find that JHEP02 (2014)055 the right-handed charm quark component can be mostly composite together with their partners being as light as 600 GeV, while the right-handed up quark needs either to be mostly elementary or to have partners as heavy as 2 TeV. Models where right-handed uptype quarks are fully composite fermions are also analysed and yield qualitatively similar conclusions. Finally, we consider the case where both the fourplet and the singlet states are present. We demonstrate that in this case the fourplet bounds could be significantly weaken due to a combination of smaller production rates and the opening of new channels including cascade processes.

show abstract

“…The mass gap between the M W , M Z and M h masses, all of O(100 GeV), and the new physics scale (if there is one within reach), suggests that the Higgs boson and the would-be Goldstone bosons ω ± and z could be (pseudo) Goldstone Boson [111][112][113][114][115][116][117][118], related with a global spontaneous symmetry breaking extending the SU (2) L × SU (2) R → SU (2) L+R global symmetry breaking of the SM. There are several models with specific implementations for the relevant global symmetry breaking pattern: the (Minimal) Composite Higgs Model based on the coset SO(5)/SO(4) [78][79][80][81], dilaton models [82,83] and others [119].…”

Section: Chapter 2 Chiral Ew Lagrangianmentioning

confidence: 99%

Study of the Electroweak Symmetry Breaking Sector for the LHC

López¹

2017

Springer Theses

View full text Add to dashboard Cite

Anatomy of a composite Higgs model

Cited by 556 publications

References 19 publications

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Light non-degenerate composite partners at the LHC

Study of the Electroweak Symmetry Breaking Sector for the LHC

Contact Info

Product

Resources

About