Predicting Spatial Curvature ΩK in globally CPT-symmetric universes
ORAL
Abstract
The CPT-symmetric universe model, positing symmetry under charge, parity, and time reversal at the Big Bang, offers a compelling framework for addressing fundamental problems in cosmology and Standard Model of particle physics. We extend this model by incorporating the symmetric conditions at the end of the Universe, which impose constraints on the allowed perturbation modes. These constrained modes conflict with the integer wave vectors required by the global spatial geometry in a closed universe.
Remarkably, resolving this conflict leads to specific predictions for the spatial curvature of the universe ΩK ∈ {−0.016, −0.011, −0.004, . . .}, aligning with observations from the Planck satellite.
To obtain more precise predictions, we are further investigating the incorporation of matter and radiation anisotropy. As a further step, we generate CMB power spectra for direct comparison with observations, potentially providing an observational probe of the CPT-symmetric universe.
Remarkably, resolving this conflict leads to specific predictions for the spatial curvature of the universe ΩK ∈ {−0.016, −0.011, −0.004, . . .}, aligning with observations from the Planck satellite.
To obtain more precise predictions, we are further investigating the incorporation of matter and radiation anisotropy. As a further step, we generate CMB power spectra for direct comparison with observations, potentially providing an observational probe of the CPT-symmetric universe.
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Publication: Arxiv number: 2407.18225, has been accepted as a Regular Article in Physical Review D (in production process).
Presenters
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Wei-Ning Deng
The Cavendish Laboratory, University of Cambridge
Authors
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Wei-Ning Deng
The Cavendish Laboratory, University of Cambridge
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Will Handley
Cavendish Laboratory, University of Cambridge