Exploring mirror twin Higgs cosmology with present and future weak lensing surveys

Abstract

We explore the potential of precision cosmological data to study non-minimal dark sectors by updating the cosmological constraint on the mirror twin Higgs model (MTH). The MTH model addresses the Higgs little hierarchy problem by introducing dark sector particles. In this work, we perform a Bayesian global analysis that includes the latest cosmic shear measurement from the DES three-year survey and the Planck CMB and BAO data. In the early Universe, the mirror baryon and mirror radiation behave as dark matter and dark radiation, and their presence modifies the Universe's expansion history. Additionally, the scattering between mirror baryon and photon generates the dark acoustic oscillation process, suppressing the matter power spectrum from the cosmic shear measurement. We demonstrate how current data constrain these corrections to the ΛCDM cosmology and find that for a viable solution to the little hierarchy problem, the proportion of MTH dark matter cannot exceed about 30% of the total dark matter density, unless the temperature of twin photon is less than 30% of that of the standard model photon. While the MTH model is presently not a superior solution to the observed H 0 tension compared to the ΛCDM+ΔN eff model, we demonstrate that it has the potential to alleviate both the H 0 and S 8 tensions, especially if the S 8 tension persists in the future and approaches the result reported by the Planck SZ (2013) analysis. In this case, the MTH model can relax the tensions while satisfying the DES power spectrum constraint up to k ≲ 10 hMpc-1. If the MTH model is indeed accountable for the S 8 and H 0 tensions, we show that the future China Space Station Telescope (CSST) can determine the twin baryon abundance with a 10% level precision.

Space Astronomy in China

“…We see that incorporating DES 3×2pt data improves constraints compared to early universe observations (P18 + BAO) by a factor ranging from one to five. Our results support conclusions from previous studies [10,43] that observations of WL on small-scale matter distributions in the late universe provide a more precise exploration of DM physics. Finally, the projected 95% upper limits (the green lines in Fig.…”

“…The scan range required for Eq. 7 can be found in previous work [43]. We assume all the DM particles can scatter with proton.…”

“…We include the following cosmological data into the likelihood: (i) The 3×2pt likelihood based on the DES Y3 observations [43,46], (ii) The CMB likelihoods are calculated based on Planck 2018 Legacy (P18) [47], including high-ℓ power spectra (TT, TE, and EE), low-ℓ power spectrum (TT and EE), and Planck lensing power spectrum (lensing), (iii) The BAO likelihood contains the BOSS DR12 dataset measurements at z = 0.106, z = 0.15 and z = 0.2 − 0.75 [48][49][50]. The details of DES Y3 3×2pt data and modeling are given in the Appendix C.…”

Electromagnetic Signatures of Mirror Stars

“…ADM is not only self-interacting: It can form dark atomic bound states and is dissipative, meaning it can cool by emitting dark photons and collapse to form structure. While ADM would therefore leave its imprint in early-Universe cosmology (Cyr-Racine et al 2014;Bansal et al 2022Bansal et al , 2023Zu et al 2023) and galactic dynamics (Fan et al 2013a;Ghalsasi & McQuinn 2018;Gemmell et al 2023;Roy et al 2023), 4 one of its most spectacular predictions is the existence of mirror stars.…”