Effects of SM Kaluza-Klein excitations on electroweak observables

Details Effects of SM Kaluza-Klein excitations on electroweak observables Effects of SM Kaluza-Klein excitations on electroweak observables

1999-02-25

arxiv.org/abs/hep-ph/9902467v2

Phys.Rev.D60:096005,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, Latex, 1 figure, clarifying sentences and refs. added

Scientific paper

10.1103/PhysRevD.60.096005

The presence of an extra dimension of size R \approx TeV^{-1} introduces a tower of Kaluza-Klein gauge boson excitations that affects the standard model (SM) relations between electroweak observables. The mixing of the W and Z bosons with their excitations changes their masses and couplings to fermions. This effect depends on the Higgs field, which may live in the bulk of the extra dimension, on its boundary, or may be a combination of both types of fields. We use high-precision electroweak data to constrain 1/R. We find limits from 1 to 3 TeV from different observables, with a model independent bound of 2.5 TeV.

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