Warped Phenomenology in the Holographic Basis

TL;DR

This paper introduces the holographic basis as a new method to quantitatively analyze elementary and composite mixing in warped holographic models, focusing on bulk fermions in AdS_5 and their implications for Standard Model fermions.

Contribution

It applies the holographic basis to bulk fermions in AdS_5, providing a detailed quantitative analysis of elementary-composite mixing, especially for the right-handed top quark.

Findings

The massless eigenstate of the right-handed top quark is approximately a 50/50 elementary-composite mixture.

The holographic basis effectively translates phenomenological successes of warped models into partial compositeness language.

Abstract

The holographic basis is a novel tool which allows for a quantitative description of elementary/composite mixing in holographic duals of warped models. We apply this tool to bulk fermions in a slice of AdS_5 and determine the precise admixture of elementary source field and composite resonances forming the Standard Model fermions. In particular, for the phenomenologically important case of an IR localized right-handed top quark, we show that the massless eigenstate is approximately a 50/50 elementary-composite admixture. We also translate, in a simple yet quantitative manner, several of the phenomenological successes enjoyed by warped models to the language of partial compositeness.