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10 papers found.
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Running non-minimal inflation with stabilized inflaton potential

In the context of the Higgs model involving gauge and Yukawa interactions with the spontaneous gauge symmetry breaking, we consider \(\lambda \phi ^4\) inflation with non-minimal gravitational coupling, where the Higgs field is identified as the inflaton. Since the inflaton quartic coupling is very small, once quantum corrections through the gauge and Yukawa interactions are taken ...

Fermion dark matter in gauge-Higgs unification

We propose a Majorana fermion dark matter in the context of a simple gauge-Higgs Unification (GHU) scenario based on the gauge group SU(3)×U(1)′ in 5-dimensional Minkowski space with a compactification of the 5th dimension on S 1/Z 2 orbifold. The dark matter particle is identified with the lightest mode in SU(3) triplet fermions additionally introduced in the 5-dimensional bulk. ...

Electroweak vacuum stability in classically conformal \(B-L\) extension of the standard model

We consider the minimal U(1)\(_{B-L}\) extension of the standard model (SM) with the classically conformal invariance, where an anomaly-free U(1)\(_{B-L}\) gauge symmetry is introduced along with three generations of right-handed neutrinos and a U(1)\(_{B-L}\) Higgs field. Because of the classically conformal symmetry, all dimensional parameters are forbidden. The \(B-L\) gauge ...

Testing the 2-TeV resonance with trileptons

The CMS collaboration has reported a 2.8σ excess in the search of the SU(2) R gauge bosons decaying through right-handed neutrinos into the two electron plus two jets (eejj) final states. This can be explained if the SU(2) R charged gauge bosons W R ± have a mass of around 2 TeV and a right-handed neutrino with a mass of \( \mathcal{O} \)(1) TeV mainly decays to electron. Indeed, ...

Vacuum stability and naturalness in type-II seesaw

We study the vacuum stability and perturbativity conditions in the minimal type-II seesaw model. These conditions give characteristic constraints to the model parameters. In the model, there is a \(SU(2)_L\) triplet scalar field, which could cause a large Higgs mass correction. From the naturalness point of view, heavy Higgs masses should be lower than \(350\,\mathrm{GeV}\), which ...

Split-SUSY versus SUSY GUTs

Gauge coupling unification is one of main motivations in the split-SUSY scenario, in which the existence of grand unified theories (GUTs) is assumed. We examine how to realize a split-SUSY mass spectrum in the context of GUTs and find that the construction of split-SUSY GUTs is by no means straightforward. With R-symmetry breaking sources in the GUT sector, GUT particles play the ...

Structure of Split Supersymmetry and Simple Models

Naoyuki Haba 1 Nobuchika Okada 0 0 Theory Division , KEK, Tsukuba 305-0801, Japan 1 Institute of Theoretical Physics, University of Tokushima , Tokushima 770-8502, Japan We derive in detail a

Effective Potential of Higgs Field in Warped Gauge-Higgs Unification

Gauge-Higgs unification is one of the influential scenarios for solving the hierarchy problem in the Standard Model. Recently, the scenario on the warped background attracts much attention owing to a large possibility to construct a realistic model naturally in this framework. It is, however, well known that the effective potential for the Higgs field, which is the most important ...

A Composite Model of Quarks with the ‘Effective Supersymmetry’

Nobuchika OKADA 0 0 Department of Physics, Tokyo Metropolitan University Hachioji 192-0364 , Japan We present a composite model of quarks with 'effective supersymmetry'. The model is based on the

Natural µ-Term Generation in Supergravity Scenario

We discuss a natural way to generate the µ-term in the supergravity scenario. Once supergravity effects are taken into account, the vacuum expectation values (VEVs) of the heavy fields are in general shifted from their values in the supersymmetric limit. We note that this fact is independent of any Kähler ansatz, and the values of the VEV shifts are of the order of the gravitino ...