The Higgs boson mass in minimal Technicolor models

Doff, A.; Natale, A. A.; Nielsen, M.; Navarra, F. S.; Bracco, Mirian E.

doi:10.1063/1.3523220

Cited by 8 publications

(23 citation statements)

References 7 publications

(27 reference statements)

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“…We could simply assume that such symmetry results from a more complex gauge group, for example such as the one proposed in Refs. [30,31], where a Z 2 symmetry arises as a result of spontaneous symmetry breaking of a gauge symmetry at high-energy scales.…”

Section: Discrete Symmetrymentioning

confidence: 99%

“…There exist many incarnations of 331 models in the literature, and many of them actually do not offer any viable dark matter candidate: these include the "minimal" 331 model [17][18][19], the "economical" 331 model [20,21], and the 331 with two triplets of scalars [22,23], among others [24][25][26][27]. Supersymmetric [28,29] or Technicolor [30,31] versions of these constructions might offer the prospect of having a viable dark matter candidate. However, these supersymmetric and technicolor extensions have not yet addressed the issue of producing a suitable dark matter candidate in any detail.…”

Section: Introductionmentioning

confidence: 99%

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Constraining the $$Z^{\prime }$$ Z ′ mass in 331 models using direct dark matter detection

Profumo

Queiroz

2014

Eur. Phys. J. C

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We investigate a so-called 331 extension of the Standard Model gauge sector which accommodates neutrino masses and where the lightest of the new neutral fermions in the theory is a viable particle dark matter candidate. In this model, processes mediated by the additional Z gauge boson set both the dark matter relic abundance and the scattering cross section off of nuclei. We calculate with unprecedented accuracy the dark matter relic density, including the important effect of coannihilation across the heavy fermion sector, and show that indeed the candidate particle has the potential of having the observed dark matter density. We find that the recent LUX results put very stringent bounds on the mass of the extra gauge boson, M Z 2 TeV, independently of the dark matter mass. We also comment on the regime where our bounds on the Z mass may apply to generic 331-like models, and on implications for LHC phenomenology.

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Section: Discrete Symmetrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Constraining the $$Z^{\prime }$$ Z ′ mass in 331 models using direct dark matter detection

Profumo

Queiroz

2014

Eur. Phys. J. C

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“…In the models discussed in Refs. [8,9] most of the fermion masses turn out to be quite heavy and proportional to λ E µ TC . That is the reason for introducing a horizontal (or family) symmetry,…”

Section: Pos(eps-hep2019)601mentioning

confidence: 99%

Technicolor coupled models

Natale¹,

Doff²

2020

Proceedings of European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2019)

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“…These models have some phenomenological differences [7], although their fermionic content is not totally different and it is possible to have even more extensions of this type of models [8]. They also have a different number of composite scalar particles as well as different couplings among themselves [9].There is a striking difference between models based on fundamental or composite scalar bosons. In the case of a fundamental scalar boson we just have a scalar potential with a mass and coupling constant conveniently adjustable to provide the correct gauge symmetry breaking of the standard model.…”

mentioning

confidence: 99%

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confidence: 99%

Deciphering the minimum of energy of some walking technicolor models

Doff¹,

Natale²

2010

Phys. Rev. D

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There are quasiconformal theories, like the minimal and ultraminimal technicolor models, which may break dynamically the gauge symmetry of the standard model and at the same time are compatible with electroweak precision data. The main characteristic of this type of models is their fermionic content in one or more higher dimensional representations; therefore it is not immediately known which model leads to the most attractive channel or the minimum vacuum energy state. We discuss the effective potential for composite operators for these models, verifying that their vacuum energy values are different, with the ultraminimal model having a deeper minimum of energy. DOI: 10.1103/PhysRevD.81.097702 PACS numbers: 12.60.Nz, 12.60.Fr The nature of the Higgs boson is one of the most important problems in particle physics, and there are many questions that may be answered in the near future by the LHC experiments, such as the following: Is the Higgs boson, if it exists at all, elementary or composite, and what are the symmetries behind the Higgs mechanism? The possibility that the Higgs boson is a composite state instead of an elementary one is more akin to the phenomenon of spontaneous symmetry breaking that originated from the effective Ginzburg-Landau Lagrangian, which can be derived from the microscopic BCS theory of superconductivity describing the electron-hole interaction (or the composite state in our case). This dynamical origin of the spontaneous symmetry breaking has been discussed with the use of many models, the technicolor (TC) model being the most popular one [1].Unfortunately we do not know the dynamics that form the scalar bound state, which should play the role of the Higgs boson in the standard model symmetry breaking. Most of the models for the spontaneous symmetry breaking of the standard model based on the composite Higgs boson system depend on specific assumptions about the dynamics responsible for the bound state formation [2], and the work in this area tries to find the TC dynamics dealing with the particle content of the theory, in order to obtain a technifermion self-energy that does not lead to phenomenological problems as in the scheme known as walking technicolor [3]. These are theories where the incompatibility with the experimental data has been solved, making the new strong interaction almost conformal and changing appreciably its dynamical behavior. We can obtain an almost conformal TC theory, when the fermions are in the fundamental representation, introducing a large number of TC fermions (n F ), leading to an almost zero function and flat asymptotic coupling constant. The cost of such a procedure may be a large S parameter [4] incompatible with the high precision electroweak measurements.TC models with fermions in other representations than the fundamental one, as happen in the minimal [5] (MWT) and ultraminimal [6] (UMT) TC models, are possible viable models without conflict with the known value for the measured S parameter, which may be calculated assuming valid the perturbative...

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The Higgs boson mass in minimal Technicolor models

Cited by 8 publications

References 7 publications

Constraining the $$Z^{\prime }$$ Z ′ mass in 331 models using direct dark matter detection

Constraining the $$Z^{\prime }$$ Z ′ mass in 331 models using direct dark matter detection

Technicolor coupled models

Deciphering the minimum of energy of some walking technicolor models

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