Mirror Twin Higgs Cosmology: Constraints and a Possible Resolution to the $H_0$ and $S_8$ Tensions

Abstract

The mirror twin Higgs model (MTH) is a solution to the Higgs hierarchy problem that provides well-predicted cosmological signatures with only three extra parameters: the temperature of the twin sector, the abundance of twin baryons, and the vacuum expectation value (VEV) of twin electroweak symmetry breaking. These parameters specify the behavior of twin radiation and the acoustic oscillations of twin baryons, which lead to testable effects on the cosmic microwave background (CMB) and large-scale structure (LSS). While collider searches can only probe the twin VEV, through a fit to cosmological data we show that the existing CMB (Planck18 TTTEEE+lowE+lowT+lensing) and LSS (KV450) data already provide useful constraints on the remaining MTH parameters. Additionally, we show that the presence of twin radiation in this model can raise the Hubble constant $H_0$ while the scattering twin baryons can reduce the matter fluctuations $S_8$, which helps to relax the observed $H_0$ and $S_8$ tensions simultaneously. This scenario is different from the typical $\Lambda$CDM + $\Delta N_{\mathrm{eff}}$ model, in which extra radiation helps with the Hubble tension but worsens the $S_8$ tension. For instance, when including the SH0ES and Planck SZ data in the fit, we find that a universe with $\gtrsim 20\%$ of the dark matter comprised of twin baryons is preferred over $\Lambda$CDM by $\sim 4\sigma$. If the twin sector is indeed responsible for resolving the $H_0$ and $S_8$ tensions, future measurements from the Euclid satellite and CMB Stage 4 experiment will further measure the twin parameters to $O(1-10\%)$-level precision. Our study demonstrates how models with hidden naturalness can potentially be probed using precision cosmological data.

45 pages, 18 figures. Published version: Fixed a typo in the code, expanded the discussion of CMB phase shift in the MTH model, conclusions are unchanged. Code available at https://github.com/srbPhy/class_twin

References in corpus (27)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• Measurements of the Hubble Constant: Tensions in Perspective
• Ab initio calculation of the neutron-proton mass difference
• Arbitrating the $S_8$ discrepancy with growth rate measurements from Redshift-Space Distortions
• The Twin Higgs mechanism and Composite Higgs
• Twin SUSY
• Neutral Naturalness from the Orbifold Higgs
• A Supersymmetric Twin Higgs
• A Holographic Twin Higgs Model
• The Parallax of Omega Centauri Measured from Gaia EDR3 and a Direct, Geometric Calibration of the Tip of the Red Giant Branch and the Hubble Constant
• BBN for the LHC: constraints on lifetimes of the Higgs portal scalars
• Minimal Mirror Twin Higgs
• Interacting radiation after Planck and its implications for the Hubble Tension
• Thermalisation of sterile neutrinos in the early Universe in the 3+1 scheme with full mixing matrix
• Dark Sector to Restore Cosmological Concordance
• SUSY Meets Her Twin
• Partially Acoustic Dark Matter Cosmology and Cosmological Constraints
• A Little Twin Higgs Model
• Effective Theory of Flavor for Minimal Mirror Twin Higgs
• Direct Detection of Mirror Matter in Twin Higgs Models
• Minimal Non-Abelian Supersymmetric Twin Higgs
• Cosmological Production of Dark Nuclei
• Closing up the cluster tension?
• Cosmology of the Twin Higgs without explicit ${\mathbb{Z}}_2$ breaking

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