SciPost Submission Page

If the Weak Were Strong and the Strong Were Weak

by Nakarin Lohitsiri, David Tong

Submission summary

As Contributors: David Tong
Arxiv Link: https://arxiv.org/abs/1907.08221v2
Date accepted: 2019-10-15
Date submitted: 2019-09-28
Submitted by: Tong, David
Submitted to: SciPost Physics
Domain(s): Theoretical
Subject area: Quantum Physics

Abstract

We explore the phase structure of the Standard Model as the relative strengths of the SU(2) weak force and SU(3) strong force are varied. With a single generation of fermions, the structure of chiral symmetry breaking suggests that there is no phase transition as we interpolate between the SU(3)-confining phase and the SU(2)-confining phase. Remarkably, the massless left-handed neutrino, familiar in our world, morphs smoothly into a massless right-handed down-quark. With multiple generations, a similar metamorphosis occurs, but now proceeding via a phase transition. In the second half of the paper we introduce a two-parameter extension of the Standard Model, a chiral gauge theory with gauge group U(1) x Sp(r) x SU(N). We again explore the phase structure of the theory as the relative strengths of the Sp(r) and SU(N) gauge couplings vary.

Current status:
Publication decision taken: accept

Author comments upon resubmission

Our thanks to the referee for their kind report. We have made the requested changes.

List of changes

References added and typos fixed.

Submission & Refereeing History

Resubmission 1907.08221v2 on 28 September 2019
Submission 1907.08221v1 on 6 August 2019

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