Category Archives: Inflation

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New code release from NEDE-Cosmo!

We have made public the likelihood code for our work on Dark Acoustic Oscillations (DAOs) and the interpretation of DESI DR2:

DAO_bias_DESI_DR2:
https://github.com/NEDE-Cosmo/DAO_bias_DESI_DR2

The repository provides a Cobaya likelihood implementing the DAO bias effect studied in our paper (arXiv:2512.15870), making it straightforward to explore this effect in cosmological parameter analyses.

It is part of our NEDE-Cosmo GitHub page, where we are collecting codes and likelihoods developed in connection with our work on cosmic tensions and physics beyond ΛCDM:

github.com/NEDE-Cosmo

This already includes TriggerCLASS for Cold New Early Dark Energy (Cold NEDE), DRMD-CLASS for Dark Radiation–Matter Decoupling / Hot NEDE, and now the DESI DR2 DAO-bias likelihood.

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“The H0 World Cup” is out (see links below). They have made a thorough update of “The H0 Olympics” paper from 5 years ago by the same core author group, with an extensive comparison of models in light of new data. This independent analysis shows that the Cold NEDE and Hot NEDE (with DRMD) models are among the leading models for solving the Hubble tension.

While Cold NEDE is clearly among the leading models (in the EDE class), Hot NEDE with DRMD (in the class of dark radiation models) is only among the leading models when allowing for running and running of the running of the spectral index, as also shown in our recent paper (“The End of the First Act”). In the short summary paper, this discussion is not included, and for the full picture of the DRMD model, one should read their second long paper (see links below).

The first short “The H0 World Cup” summary paper: https://arxiv.org/abs/2607.13282

The second long “The H0 World Cup” complete paper: https://arxiv.org/abs/2607.13283

For a YouTube video seminar where I discuss the Cold NEDE and Hot NEDE with DRMD models, and their similarities and differences, see f.ex.: https://www.youtube.com/live/VaaCsy4aPV0?si=bYtvFCzJS2AsXg5w