Extra Gauge Invariance from an Extra Dimension

Details Extra Gauge Invariance from an Extra Dimension Extra Gauge Invariance from an Extra Dimension

2008-02-26

arxiv.org/abs/0802.3702v1

Phys.Rev.D78:015001,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 eps figure, RevTeX4

Scientific paper

10.1103/PhysRevD.78.015001

We describe higher-dimensional theories whose low-energy 4D descriptions contain larger gauge or global symmetry groups. As an example, we construct a Higgsless SU(2) x U(1) model of electroweak symmetry breaking. The 5D SU(2) gauge invariance contains both the weak SU(2) gauge group and a custodial symmetry that protects the rho parameter. Fermions obtain isospin-violating masses while maintaining universal gauge couplings among all three generations. As a further example, we construct a model of chiral color based on a single SU(3).

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