Light Higgs Boson from a Pole Attractor

TL;DR

This paper introduces a novel cosmological relaxation model for the Higgs mass involving a non-canonical kinetic term that halts the scan at the observed Higgs mass, using two singlet fields and particle production friction.

Contribution

It presents a new mechanism with non-canonical kinetic terms and specific singlet fields to explain the Higgs mass within cosmological relaxation, differing from previous models.

Findings

A concrete model with two singlet fields is proposed.

The model successfully halts the Higgs mass scan at the observed value.

Particle production friction stabilizes the Higgs near the Standard Model value.

Abstract

We propose a new way of explaining the observed Higgs mass, within the cosmological relaxation framework. The key feature distinguishing it from other scanning scenarios is that the scanning field has a non-canonical kinetic term, whose role is to terminate the scan around the desired Higgs mass value. We propose a concrete realisation of this idea with two new singlet fields, one that scans the Higgs mass, and another that limits the time window in which the scan is possible. Within the provided time period, the scanning field does not significantly evolve after the Higgs field gets close to the Standard Model value, due to particle production friction.