The BAO+BBN take on the Hubble tension
By N. Schoneberg, Julien Lesgourgues, D. Hooper. Journal of Cosmology and Astroparticle Physics, 2019
207 citations recorded by the source corpus.
Many attempts to solve the Hubble tension with extended cosmological models combine an enhanced relic radiation density, acting at the level of background cosmology, with new physical ingredients affecting the evolution of cosmological perturbations. Several authors have pointed out the ability of combined Baryon Acoustic Oscillation (BAO) and Big Bang Nucleosynthesis (BBN) data to probe the background cosmological history independently of both CMB maps and supernovae data. Using state-of-the-art assumptions on BBN, we confirm that combined BAO, deuterium, and helium data are in tension with the SH0ES measurements under the ΛCDM assumption at the 3.2σ level, while being in close agreement with the CMB value. We subsequently show that floating the radiation density parameter Neff only reduces the tension down to the 2.6σ level. This conclusion, totally independent of any CMB data, shows that a high Neff accounting for extra relics (either free-streaming or self-interacting) does not provide an obvious solution to the crisis, not even at the level of background cosmology. To circumvent this strong bound, (i) the extra radiation has to be generated after BBN to avoid helium bounds, and (ii) additional ingredients have to be invoked at the level of perturbations to reconcile this extra radiation with CMB and LSS data.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/18fe2aeca3cc0cba9a2f0414951576d8acdeb183
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In Astronomy and Astrophysics
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In Nuclear and High Energy Physics
- Mikhail Ivanov
- S. Vagnozzi
- O. Philcox
- M. Sloth
- Tanvi Karwal
- V. Poulin
- Florian Niedermann
- Tristan L. Smith
Citations in the corpus
- Resolving the Hubble tension with new early dark energy (2020, methodology): “[119] N.”
- The Ups and Downs of Early Dark Energy solutions to the Hubble tension: A review of models, hints and constraints circa 2023 (2023, methodology): “In addition to this, the assumption of ΛCDM in the early universe 6 allows us to infer a value of rs(zd) from observations of the CMB, calibrating measurements of the BAO which also extend to z ' 2 [50], and provide an independent measurements of the angular diameter distance (and therefore also of ”
- Constraining early dark energy with large-scale structure (2020, unknown): “[18] N.”
- Combining full-shape and BAO analyses of galaxy power spectra: a 1.6% CMB-independent constraint on H0 (2020, methodology): “[99]&[62], demonstrating that the resulting constraints are in tension with strong lensing and supernovae Ia measurements, but consistent with the CMB.”
- Interacting dark energy in the early 2020s: A promising solution to the H0 and cosmic shear tensions (2019, unknown): “[10–109].”
- Cosmology Intertwined II: The Hubble Constant Tension (2020, unknown): “[101] N.”
- New physics in light of the H0 tension: An alternative view (2019, background): “[60–209] for what is inevitably an incomplete list of works examining these possibilities.”