Bulletin of the American Physical Society
Four Corners Section 2022 Meeting
Volume 67, Number 14
Friday–Saturday, October 14–15, 2022; Albuquerque, New Mexico
Session B02: Gravitation / Cosmology I
10:00 AM–11:24 AM,
Friday, October 14, 2022
UNM
Room: PAIS 1140
Chair: Rouzbeh Allahverdi, UNM
Abstract: B02.00001 : A Symmetry of Cosmological Observables: Looking at Hubble through the Mirror*
10:00 AM–10:24 AM
Presenter:
Francis-Yan Cyr-Racine
(University of New Mexico)
Author:
Francis-Yan Cyr-Racine
(University of New Mexico)
Many key cosmological observables have a built-in symmetry under rescaling of all important length scales in the problem. This scaling symmetry can be used to make partial progress toward a complete resolution of the Hubble tension. To exploit the symmetry while respecting observational constraints, we are naturally led to a “mirror world” dark sector. A successful implementation of this scaling symmetry requires a means of increasing the cosmic photon scattering rate that respects observational bounds on the primordial helium abundance. We discuss different ideas that could in principle achieve this rescaling, and discuss their advantages and drawbacks. We finally present some general observations about the fundamental nature of the Hubble tension.
*This work is supported by the National Science Foundation (NSF) under grant AST-2008696.
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