Portals to New Physics: The W-Quark Portal

TL;DR

This paper investigates new effective field theory operators involving exotic states interacting with the Standard Model via a W-quark portal, analyzing collider production processes and potential signals at the LHC.

Contribution

It introduces a novel class of EFT operators connecting new exotic states to SM particles through a W-quark portal, including detailed collider phenomenology.

Findings

Potential LHC signatures of new weak-quadruplet fermions

Single production mechanisms via W-quark portal processes

Feasibility of detecting exotic states at colliders

Abstract

We explore new EFT operators where single new exotic states interact with the Standard Model through an asymmetric Standard Model portal with couplings to at least one quark and one W boson. Effective operators up to dimension 6 are considered, and we specify SM charges of all new states accessible through this portal. We explore our interactions by detailing possible collider production processes at e-p and p-p colliders. Finally, we study the LHC production of a new weak-quadruplet SU(3) fundamental fermion which can be singly produced in association with a SM quark through W-quark portal processes.