What does this research mean for the field?

The Hubble tension is resolved by a T1 recovery gradient in the brane-bulk sump framework, where a local baryonic overdensity shortens the local relaxation time compared to the global equilibrium time. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.ESTABLISHES_NEW_DIRECTION.

What question did this study set out to answer?

This research aims to resolve the discrepancy in the Hubble constant measurements using a T1 recovery gradient framework.

June 8, 2026Open Access

Paper XXXV: The Hubble Tension as T1 Recovery: Tₛump Derivation and the Local H0 Gradient

Key Points

This research aims to resolve the discrepancy in the Hubble constant measurements using a T1 recovery gradient framework.
Applied the brane-bulk sump framework to calculate the global and local sump relaxation times.
Derived the Hubble constant from T_sump values based on cosmic measurements and local structure.
Used the baryonic overdensity in the local Hubble volume to assess its effect on T1 recovery.
Local Hubble constant H0,local was determined to be 73.0 km/s/Mpc, while global average H0 was 67.4 km/s/Mpc.
The difference in relaxation times, ∆T_sump = 11.81 Gyr, corresponds to local structure formation lookback.
The model suggests no new physics is needed, explaining the Hubble tension as a gradient in recovery times.

Abstract

The 6σ Hubble tension the discrepancy between H0 = 73. 0 ± 1. 0 km/s/Mpc (SH0ES, local distance ladder) and H0 = 67. 4 ± 0. 5 km/s/Mpc (Planck CMB) is resolved as a T1 recovery gradient in the brane-bulk sump framework. The Hubble constant H0 = c/Tₛump where Tₛump is the sump relaxation time. The global sump equilibrium time Tₛump, global = 72. 65 Gyr gives H0 = 67. 4 km/s/Mpc (CMB epoch average). The local Hubble volume (~100 Mpc radius) contains a baryonic overdensity relative to the cosmic mean, which perturbs the local sump T1 recovery and shortens the local relaxation time to Tₛump, local = 60. 84 Gyr, giving H0, local = 73. 0 km/s/Mpc (SH0ES). The dierence ∆Tₛump = 11. 81 Gyr corresponds to the lookback time to local structure formation. No new physics is introduced: the Hubble tension is the local/global T1 recovery gradient the sump has not yet reached global equilibrium. Part of the One-Octonion Brane-Bulk Framework series. Anchor DOI: 10. 5281/zenodo. 19120873. Community: one-octonion-brane-bulk. Author: Bharathi Dasan Jagadeesan, M. D. , University of Minnesota. ORCID: 0000-0002-1143-941X.

Paper XXXV: The Hubble Tension as T1 Recovery: Tₛump Derivation and the Local H0 Gradient

Key Points

Abstract

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