Hidden Spin-3/2 Field in the Standard Model

TL;DR

This paper explores the theoretical and phenomenological implications of a hidden massive spin-3/2 field within the Standard Model, analyzing its collider signatures, role in cosmology, and potential as dark matter.

Contribution

It introduces the concept of a hidden spin-3/2 field in the Standard Model and investigates its collider phenomenology, cosmological roles, and implications for dark matter and inflation.

Findings

Spin-3/2 field can be hidden in SM spectrum virtually

Collider signatures suggest rich phenomenology including neutrino-Higgs collider

Potential role of the field in Higgs inflation and dark matter

Abstract

Here we show that a massive spin-3/2 field can hide in the SM spectrum in a way revealing itself only virtually. We study collider signatures and loop effects of this field, and determine its role in Higgs inflation and its potential as Dark Matter. We show that this spin-3/2 field has a rich linear collider phenomenology and motivates consideration of a neutrino-Higgs collider. We also show that study of Higgs inflation, dark matter and dark energy can reveal more about the neutrino and dark sector.