A Higgs test of horizontal symmetry

Horizontal symmetry in Higgs sector of GUT with U(1)A symmetry

In a series of papers, we pointed out that an anomalous U(1)A gauge symmetry naturally solves various problems in grand unified theories (GUTs) and that a horizontal gauge symmetry, SU(2)H or SU(3)H , not only realizes the unification of three generation quarks and leptons in fewer multiplets but also solves the supersymmetric flavor problem. In this paper, we examine the possibility that the H...

A Test Of Symmetry

construction and validation of a computerized adaptive translation test (a receptive based study)

آزمون انطباقی رایانه ای (cat) روشی نوین برای سنجش سطح علمی دانش آموزان می باشد. در حقیقت آزمون های رایانه ای با سرعت بالایی به سمت و سوی جایگزین عملی برای آزمون های کاغذی می روند (کینگزبری، هاوسر، 1993). مقاله حاضر به دنبال آزمون انطباقی رایانه ای برای ترجمه می باشد. بدین منظور دو پرسشنامه مشتمل بر 55 تست ترجمه میان 102 آزمودنی و 10 مدرس زبان انگلیسی پخش گردید. پرسشنامه اول میان 102 دانشجوی س...

Holographic Theories of Electroweak Symmetry Breaking without a Higgs Boson

Recently, realistic theories of electroweak symmetry breaking have been constructed in which the electroweak symmetry is broken by boundary conditions imposed at a boundary of higher dimensional spacetime. These theories have equivalent 4D dual descriptions, in which the electroweak symmetry is dynamically broken by non-trivial infrared dynamics of some gauge interaction, whose gauge coupling g̃...

Gauge-higgs Unification with Broken Flavour Symmetry

We study a five-dimensional Gauge-Higgs unification model on the orbifold S/Z2 based on the extended standard model (SM) gauge group SU(2)L×U(1)Y ×SO(3)F . The group SO(3)F is treated as a chiral gauged flavour symmetry. Electroweak-, flavourand Higgs interactions are unified in one single gauge group SU(7). The unified gauge group SU(7) is broken down to SU(2)L × U(1)Y × SO(3)F by orbifolding ...