The evolution of gauge couplings and the Weinberg angle in 5 dimensions for an SU(3) gauge group

High Energy Particle Physics Workshop 2016

Khojali, Mohammed Omer^1 ; Cornell, A.S.^1 ; Deandrea, Aldo^2,3

National Institute for Theoretical Physics, School of Physics and Mandelstam Institute for Theoretical Physics, University of the Witwatersrand, Wits

2050, South Africa^1

Universite de Lyon, Lyon

F-69622, France^2

Universite Lyon 1, CNRS/IN2P3, UMR5822 IPNL, Villeurbanne Cedex

F-69622, France^3

关键词: Electroweak interactions;    Evolution equations;    Extra dimensions;    Gauge couplings;    Gauge symmetries;    Lower energies;    Realistic model;    Testing grounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/802/1/012005/pdf
DOI  :  10.1088/1742-6596/802/1/012005

来源: IOP

【 摘 要 】

We test in a simplified 5-dimensional model with SU(3) gauge symmetry, the evolution equations of the gauge couplings of a model containing bulk fields, gauge fields and one pair of fermions. In this model we assume that the fermion doublet and two singlet fields are located at fixed points of the extra-dimension compactified on an S1/Z2orbifold. The gauge coupling evolution is derived at one-loop in 5-dimensions, for the gauge group G = SU(3), and used to test the impact on lower energy observables, in particular the Weinberg angle. The gauge bosons and the Higgs field arise from the gauge bosons in 5 dimensions, as in a gauge- Higgs model. The model is used as a testing ground as it is not a complete and realistic model for electroweak interactions.