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We study the phase diagram and mass spectrum of an $SU(2)$ Gauge-Higgs Unification scenario on a five-dimensional orbifold.We observe spontaneous symmetry breaking within the Higgs phase of the theory and, in the vicinity of a newly…

High Energy Physics - Lattice · Physics 2015-09-14 Graham Moir , Maurizio Alberti , Francesco Knechtli , Nikos Irges

We study a five-dimensional pure SU(2) gauge theory formulated on the orbifold and discretized on the lattice by means of Monte Carlo simulations. The gauge symmetry is explicitly broken to U(1) at the orbifold boundaries. The action is the…

High Energy Physics - Lattice · Physics 2014-04-15 Francesco Knechtli , Kyoko Yoneyama , Peter Dziennik , Nikos Irges

A possible extension of the Standard Model of elementary particles is Gauge-Higgs unification, where the Higgs field is identified with (some of) the extra dimensional components of a five-dimensional gauge field. In this scenario there is…

High Energy Physics - Lattice · Physics 2011-11-03 Kyoko Yoneyama , Nikos Irges , Francesco Knechtli

The simplest Gauge-Higgs Unification model is a five-dimensional SU(2) gauge theory compactified on the S^1/Z_2 orbifold, such that on the four-dimensional boundaries of space-time there is an unbroken U(1) symmetry and a complex scalar,…

High Energy Physics - Lattice · Physics 2012-10-09 Nikos Irges , Francesco Knechtli , Kyoko Yoneyama

We study the viability of five-dimensional gauge theories as candidates for the origin of the Higgs field and its mechanism for spontaneous symmetry breaking. Within the framework of lattice field theory, we consider the simplest model of…

High Energy Physics - Lattice · Physics 2015-10-28 Maurizio Alberti , Nikos Irges , Francesco Knechtli , Graham Moir

We present a non-perturbative model of Gauge-Higgs Unification. We consider a five-dimensional pure SU(2) gauge theory with orbifold boundary conditions along the fifth dimension, such that the symmetry is reduced to U(1) at the fixed…

High Energy Physics - Lattice · Physics 2015-06-12 Nikos Irges , Francesco Knechtli , Kyoko Yoneyama

We report on the progress in the study of a five-dimensional SU(2) Gauge-Higgs Unification model. In this non-perturbative study, the Higgs mechanism is triggered by the spontaneous breaking of a global symmetry. In the same region of the…

High Energy Physics - Lattice · Physics 2016-09-27 Maurizio Alberti , Nikos Irges , Francesco Knechtli , Graham Moir

Lattice simulations of five-dimensional gauge theories on an orbifold revealed that there is spontaneous symmetry breaking. Some of the extra-dimensional components of the gauge field play the role of a Higgs field and some of the…

High Energy Physics - Lattice · Physics 2009-04-14 Magdalena Luz , Nikos Irges , Francesco Knechtli

We consider 5 dimensional gauge theories where the 5th direction is compactified on the orbifold S^1/Z_2, and where the 5th components of the gauge bosons play the role of the Standard Model Higgs boson (gauge-Higgs unification). The gauge…

High Energy Physics - Phenomenology · Physics 2008-11-26 Bohdan Grzadkowski , Jose Wudka

We present lattice simulation results corresponding to an SU(2) pure gauge theory defined on the orbifold space E_4 x I_1, where E_4 is the four-dimensional Euclidean space and I_1 is an interval, with the gauge symmetry broken to a U(1)…

High Energy Physics - Lattice · Physics 2008-11-26 N. Irges , K. Knechtli

We present novel calculations of the mass hierarchy of the $SU(2)$ pure gauge theory on a space-time lattice with an orbifolded fifth dimension. This theory has three parameters; the gauge coupling $\beta$, the anisotropy $\gamma$, which is…

High Energy Physics - Lattice · Physics 2014-11-04 Graham Moir , Peter Dziennik , Nikos Irges , Francesco Knechtli , Kyoko Yoneyama

We review a construction called Non-Perturbative Gauge-Higgs Unification which is a rather rare type of Higgs mechanism that is a pure quantum and bosonic effect. It is constructed on a five-dimensional "orbifold lattice" with SU(2) bulk…

High Energy Physics - Theory · Physics 2017-09-22 Nikos Irges

We study gauge symmetry breaking patterns of the five-dimensional $SU(5)$ grand gauge-Higgs unification compactified on an orbifold $S^1/{\mathbb Z}_2$ with the Hosotani mechanism in the framework of the diagonal embedding method. We find…

High Energy Physics - Phenomenology · Physics 2017-02-01 Kentaro Kojima , Kazunori Takenaga , Toshifumi Yamashita

The Higgs boson is unified with gauge fields in the gauge-Higgs unification. The $SO(5) \times U(1)$ gauge-Higgs electroweak unification in the Randall-Sundrum warped space yields almost the same phenomenology at low energies as the…

High Energy Physics - Phenomenology · Physics 2017-05-12 Yutaka Hosotani

In certain five dimensional gauge theories the Standard Model Higgs doublet is identified, after compactification on the orbifold S^1/Z_2, with the zero mode of the fifth component of the gauge field. An effective potential for the Higgs…

High Energy Physics - Phenomenology · Physics 2008-11-26 Ilia Gogoladze , Nobuchika Okada , Qaisar Shafi

We study grand unified models in the five-dimensional space-time where the extra dimension is compactified on $S^1/Z_2$. The spontaneous breaking of unified gauge symmetries is achieved via vacuum expectation values of the extra-dimensional…

High Energy Physics - Phenomenology · Physics 2017-06-28 Kentaro Kojima , Kazunori Takenaga , Toshifumi Yamashita

In this article, we review gauge-Higgs unification models based on gauge theories defined on six-dimensional spacetime with $S^2/Z_2$ topology in the extra spatial dimensions. On the extra $S^2/Z_2$ space, non-trivial boundary conditions…

High Energy Physics - Phenomenology · Physics 2011-09-28 Cheng-Wei Chiang , Takaaki Nomura , Joe Sato

We present an orbifold GUT model in which the NMSSM Higgs trilinear couplings are unified with the three Standard Model gauge couplings. The model is constructed as an N=2 supersymmetric SU(8) gauge theory in six dimensions, which is…

High Energy Physics - Phenomenology · Physics 2010-11-05 Ilia Gogoladze , Tianjun Li , Yukihiro Mimura , S. Nandi

A complete 5-dimensional SU(5) unified theory is constructed which, on compactification on the orbifold with two different Z_2's (Z_2 and Z_2'), yields the minimal supersymmetric standard model. The orbifold accomplishes SU(5) gauge…

High Energy Physics - Phenomenology · Physics 2009-09-29 Lawrence Hall , Yasunori Nomura

We construct a supersymmetric grand unified model in the framework of a latticized extra dimension. The SU(5) symmetries on the lattice are broken by the vacuum expectation values of the link fields connecting adjacent SU(5) sites, leaving…

High Energy Physics - Phenomenology · Physics 2009-10-09 Hsin-Chia Cheng , Konstantin T. Matchev , Jing Wang
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