The Hubble Constant Troubled by Dark Matter in Non-Standard Cosmologies by Jailson S. Alcaniz et al. on Monday 28 November

The Standard Cosmological Model has experienced tremendous success at

reproducing observational data by assuming a universe dominated by a

cosmological constant and dark matter in a flat geometry. However, several

studies, based on local measurements, indicate that the universe is expanding

too fast, in disagreement with the Cosmic Microwave Background. Taking into

account combined data from CMB, Baryon Acoustic Oscillation, and type Ia

Supernovae, we show that if the mechanism behind the production of dark matter

particles has at least a small non-thermal origin, one can induce larger values

of the Hubble rate $H_0$, within the $\Lambda$CDM, to alleviate the trouble

with $H_0$. In the presence of non-standard cosmology, however, we can fully

reconcile CMB and local measurements and reach $H_0=70-74\, {\rm km s^{-1}

Mpc^{-1}}$.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14345v1