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Cosmological Signals of a Mirror Twin Higgs

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arxiv 1611.07977 v2 pith:6POY62KR submitted 2016-11-23 hep-ph astro-ph.CO

Nathaniel Craig , Seth Koren , Timothy Trott This is my paper · ORCID
classification hep-phastro-ph.CO
keywords mirrortwincosmologicalhiggsmodelcosmologyenergynaturalness
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We investigate the cosmology of the minimal model of neutral naturalness, the mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin counterpart leads to significant dark radiation in tension with BBN and CMB observations. We quantify this tension and illustrate how it can be mitigated in several simple scenarios that alter the relative energy densities of the two sectors while respecting the softly-broken mirror symmetry. In particular, we consider both the out-of-equilibrium decay of a new scalar as well as reheating in a toy model of twinned inflation, Twinflation. In both cases the dilution of energy density in the twin sector does not merely reconcile the existence of a mirror Twin Higgs with cosmological constraints, but predicts contributions to cosmological observables that may be probed in current and future CMB experiments. This raises the prospect of discovering evidence of neutral naturalness through cosmology rather than colliders.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Extended Color Twin Higgs

    hep-ph 2025-08 conditional novelty 8.0 of 10

    A Twin Higgs model with visible-only SU(4) color breaking predicts new Z', charge-1/6 vectors and charge-1/2 fermions, with reduced tuning, lower ΔNeff, and bosonic twin baryon dark matter.

  2. Strongest constraints on dark acoustic oscillations from the Lyman-alpha forest

    astro-ph.CO 2026-06 unverdicted novelty 7.0 of 10

    First constraints from Ly-alpha forest limit DAO participation to at most 30% of dark matter for peaks below 50 h/Mpc at 95% CL using a deep kernel emulator of simulations.

  3. CMB-S4 Science Case, Reference Design, and Project Plan

    astro-ph.IM 2019-07 unverdicted novelty 3.0 of 10

    Presents the science case, reference design, and project plan for the CMB-S4 ground-based CMB experiment.

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