Bulk RS models, Electroweak Precision tests and the 125 GeV Higgs

TL;DR

This paper updates electroweak fits for various Randall-Sundrum models, analyzing KK mode masses and fine-tuning, with implications for new physics at TeV scales.

Contribution

It provides the first comprehensive electroweak fit comparison across bulk, deformed, and custodial RS models, including KK mass estimates and fine-tuning analysis.

Findings

Lightest KK gauge boson in bulk RS ~8 TeV

Custodial RS KK mode ~3 TeV

Deformed RS model allows KK masses < 2 TeV with less fine-tuning

Abstract

We present upto date electroweak fits of various Randall Sundrum (RS) models. We consider the bulk RS model, deformed RS and the custodial RS models. For the bulk RS case we find the lightest Kaluza Klein (KK) mode of the gauge boson to be $\sim 8$ TeV while for the custodial case it is $\sim 3$ TeV. The deformed model is the least fine tuned of all which can give a good fit for KK masses $< 2$ TeV depending on the choice of the model parameters. We also comment on the fine tuning in each case.