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Keyword: structure growth suppression ×Clear all

3 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Spontaneous Symmetry Breaking as a Late-Time Trigger for Interacting Dark Energy

   Keshav, NS and Kenath · arXiv (Cornell University) · 2025

   The authors model a scalar dark energy field that, after spontaneous symmetry breaking, takes energy from dark matter and slows structure growth, then fit it to several cosmological datasets.

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   1. Unchecked“This creates a symmetric phase (a <= ac) identical to LambdaCDM at early times, and a broken phase (a > ac) in which eta(a) > 0 transfers energy from dark matter to dark energy, suppressing linear structure growth.”
   2. Unchecked“In the full joint fit, we obtain Omega_m = 0.29 +/- 0.01, H0 = 69.7 +/- 0.6 km s^-1 Mpc^-1, and sigma8,0 = 0.78 +/- 0.01.”
   3. UncheckedIn this model, a late-time dark matter–dark energy interaction can damp structure growth and ease the S8 tension without changing expansion or H0 much.“A late-time interaction triggered by spontaneous symmetry breaking can therefore damp structure growth and ease the S8 tension while leaving the expansion history and the inferred H0 essentially unchanged, suggesting distinct physical origins for the two tensions.”