The TopFlavor scheme in the context of $W'$ searches at LHC

TL;DR

This paper investigates the TopFlavor Model's predictions for a $W'$ boson with preferential third-generation couplings, comparing it to the SSM, and highlights the importance of systematic, model-independent collider analyses for future LHC searches.

Contribution

It provides a detailed comparison of the TopFlavor Model's $W'$ predictions with the SSM, identifying parameter regions with suppressed cross sections relevant for LHC searches.

Findings

$pp o W' o au u$ and $pp o W' o tb$ cross sections can be two orders of magnitude smaller than SSM.

Certain parameter regions remain open for $W'$ searches at the LHC.

Systematic, model-independent analyses are crucial for guiding future collider searches.

Abstract

Many extensions of the Standard Model predict the existence of new charged or neutral gauge bosons, with a wide variety of phenomenological implications depending on the model adopted. The search for such particles is extensively carried through at the Large Hadron Collider (LHC), and it is therefore of crucial importance to have for each proposed scenario quantitative predictions that can be matched to experiments. In this work we focus on the implications of one of these models, the TopFlavor Model, proposing a charged $\text{W}^\prime$ boson that has preferential couplings to the third generation fermions. We compare such predictions to the ones from the so called Sequential Standard Model (SSM), that is used as benchmark, being one of the simplest and most commonly considered models for searches at the LHC. We identify the parameter space still open for searches at the LHC, and in particular we show that the cross section for the processes $pp \to \text{W}^\prime \to \tau \nu$ and $pp \to \text{W}^\prime \to tb$ can be up to two orders of magnitude smaller with respect to the SSM, depending on the free parameters of the model, like the particle mass and its width. This study makes the case for further searches at the LHC, and shows how a complete and systematic model independent analysis of $\text{W}^\prime$ boson phenomenology at colliders is essential to provide guidance for future searches.