Hubble tension as a window on the gravitation of the dark matter sector

Abstract

A simple and minimal extension of the standard cosmological $\Lambda$CDM model in which dark matter experiences an additional long-range scalar interaction is demonstrated to alleviate the long lasting Hubble-tension while letting primordial nucleosynthesis predictions unaffected and passing by construction all current local tests of general relativity. The theoretical formulation of this $\Lambda \beta$CDM model and its comparison to astrophysical observations are presented to prove its ability to fit existing data and potentially resolve the tension.

3 figures, 6 pages. arXiv admin note: text overlap with arXiv:2312.12408

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• Late-time Background Constraints on Linear and Non-linear Interacting Dark Energy after DESI DR2
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• Quantum Mechanics from General Relativity and the Quantum Friedmann Equation
• Apparent $w<-1$ and a Lower $S_8$ from Dark Axion and Dark Baryons Interactions