Gauge coupling unification via a technicolor model

Gudnason, Sven Bjarke; Ryttov, Thomas A.; Sannino, Francesco

doi:10.1103/physrevd.76.015005

Cited by 51 publications

(68 citation statements)

References 44 publications

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“…1/5 as at 1-loop order (13), (14). This is useful in the numerical analysis, since one can first use as varying parameters just these combinations, and the extrapolate the result for the case of different fermionic and bosonic masses.…”

Section: Unification Constraints and The Mass Scales Of The Theorymentioning

confidence: 99%

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Probing the seesaw mechanism at CERN LHC

2007

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We have recently proposed a simple SU(5) theory with an adjoint fermionic multiplet on top of the usual minimal spectrum. This leads to the hybrid scenario of both type I and type III seesaw and it predicts the existence of the fermionic SU(2) triplet between 100 GeV and 1 TeV for a conventional GUT scale of about 10 16 GeV, with main decays into W (Z) and leptons, correlated through Dirac Yukawa couplings, and lifetimes shorter than about 10 −12 sec. These decays are lepton number violating and they offer an exciting signature of ∆L = 2 dilepton events together with 4 jets at future pp (pp) colliders. Increasing the triplet mass endangers the proton stability and so the seesaw mechanism could be directly testable at LHC.

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Section: Unification Constraints and The Mass Scales Of The Theorymentioning

confidence: 99%

“…The main prediction of this theory is the lightness of the fermionic triplet (for a recent alternative scenario with light triplets see [14]). For a conventional value of M GU T ≈ 10 16 GeV, the unification constraints strongly suggest its mass below TeV, relevant for the future colliders such as LHC.…”

Section: Introductionmentioning

confidence: 99%

Probing the seesaw mechanism at CERN LHC

2007

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“…This extension of the standard model passes the electroweak precision constraints [8] while displaying some interesting features. For example, it allows for a successful unification of the standard model couplings at the one loop level [11]. Also interesting types of dark matter components [12 -14] can be envisioned.…”

Section: Introductionmentioning

confidence: 99%

Minimal walking technicolor: Setup for collider physics

et al. 2007

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Different theoretical and phenomenological aspects of the minimal and nonminimal walking technicolor theories have recently been studied. The goal here is to make the models ready for collider phenomenology. We do this by constructing the low energy effective theory containing scalars, pseudoscalars, vector mesons, and other fields predicted by the minimal walking theory. We construct their selfinteractions and interactions with standard model fields. Using the Weinberg sum rules, opportunely modified to take into account the walking behavior of the underlying gauge theory, we find interesting relations for the spin-one spectrum. We derive the electroweak parameters using the newly constructed effective theory and compare the results with the underlying gauge theory. Our analysis is sufficiently general such that the resulting model can be used to represent a generic walking technicolor theory not at odds with precision data.

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“…Because the addition of new particles is small, this model is within the Electroweak Measurements and because of the quasi-conformality this model avoids the problems of the old technicolor theories, such as giving mass to the heavy particles like the top quark. The attraction of these models enhances since they can achieve unification of couplings [17]. There can be several different possibilities for having dark matter candidates from these technicolor theories.…”

Section: Introductionmentioning

confidence: 99%

Dark Majorana particles from the minimal walking technicolor theory

Kouvaris

2007

Phys. Rev. D

109

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We investigate the possibility of a dark matter candidate emerging from a minimal walking technicolor theory. In this case techniquarks as well as technigluons transform under the adjoint representation of SU (2) of technicolor. It is therefore possible to have technicolor neutral bound states between a techniquark and a technigluon. We investigate this scenario by assuming that such a particle can have a Majorana mass and we calculate the relic density. We identify the parameter space where such an object can account for the full dark matter density avoiding constraints imposed by the CDMS and the LEP experiments. * Electronic address: kouvaris@nbi.dk

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Gauge coupling unification via a technicolor model

Cited by 51 publications

References 44 publications

Probing the seesaw mechanism at CERN LHC

Probing the seesaw mechanism at CERN LHC

Minimal walking technicolor: Setup for collider physics

Dark Majorana particles from the minimal walking technicolor theory

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