Ultra Visible Warped Model From Flavor Triviality & Improved Naturalness

TL;DR

This paper presents a warped extra-dimensional model with improved experimental visibility and naturalness, predicting suppressed flavor violation, potential new flavor gauge bosons, and distinctive CP violation effects in B-meson mixing.

Contribution

It introduces a flavor triviality-based warped model with a lower Kaluza-Klein scale, enhanced naturalness, and testable flavor physics signatures at the LHC.

Findings

Kaluza-Klein scale of 2.1 TeV at 95.4% CL

Relaxed bound to 1.7 TeV with parameter fitting

Predicted flavor gauge bosons and CP violation effects

Abstract

A warped extra-dimensional model, where the Standard Model Yukawa hierarchy is set by UV physics, is shown to have a sweet spot of parameters with improved experimental visibility and possibly naturalness. Upon marginalizing over all the model parameters, a Kaluza-Klein scale of 2.1 TeV can be obtained at 2 sigma (95.4 CL) without conflicting with electroweak precision measurements. Fitting all relevant parameters simultaneously can relax this bound to 1.7 TeV. In this bulk version of the Rattazzi-Zaffaroni shining model, flavor violation is also highly suppressed, yielding a bound of 2.4 TeV. Non-trivial flavor physics at the LHC in the form of flavor gauge bosons is predicted. The model is also characterized by a depletion of the third generation couplings -- as predicted by the general minimal flavor violation framework -- which can be tested via flavor precision measurements. In particular, sizable CP violation in Delta B=2 transitions can be obtained, and there is a natural region where Bs mixing is predicted to be larger than Bd mixing, as favored by recent Tevatron data. Unlike other proposals, the new contributions are not linked to Higgs or any scalar exchange processes.