Phenomenology of Non-Custodial Warped Models

TL;DR

This paper investigates how bulk fermions influence electroweak precision tests in warped extra dimension models without custodial symmetry, identifying parameter constraints and potential signals at the LHC.

Contribution

It provides a detailed analysis of electroweak constraints in non-custodial warped models, highlighting the role of the top quark and finite T parameter contributions.

Findings

Massive vector bosons can be as light as 1.5 TeV with large couplings to t_R

Constraints from top-quark mass and electroweak precision data restrict parameter space

Implications for LHC searches of warped extra dimension models

Abstract

We study the effect of bulk fermions on electroweak precision observables in a recently proposed model with warped extra dimensions and no custodial symmetry. We find that the top-quark mass, together with the corrections to the Zbb vertex and the one-loop contribution to the T parameter, which is finite, impose important constraints that single out a well defined region of parameter space. New massive vector bosons can be as light as 1.5 TeV and have large couplings to the t_R quark, and suppressed couplings to the t_L, b_L and lighter quarks. We discuss the implications for searches of models with warped extra dimensions at the LHC.