DESI constraints on the varying electron mass model and axion-like early dark energy

TL;DR

This paper uses recent DESI BAO data, combined with CMB and supernova observations, to constrain models with varying electron mass and early dark energy, addressing the Hubble tension.

Contribution

It provides new constraints on the varying electron mass and early dark energy models using the latest DESI data, enhancing understanding of their viability.

Findings

DESI BAO data suggests a slightly longer sound horizon.

The varying electron mass model indicates a higher Hubble constant of 69.44 km/s/Mpc.

Constraints on early dark energy models are improved with new data.

Abstract

Baryon acoustic oscillation (BAO) is one of the important standard rulers in cosmology. The results of the latest BAO measurements by Dark Energy Spectroscopic Instrument (DESI) survey have been reported. Cosmology with the varying electron mass model and the early dark energy models are regarded as interesting models to resolve the Hubble tension. We present constraints on the varying electron mass model and early dark energy models in new DESI data as well as cosmic microwave background by Planck and the conventional BAO data from 6dF, MGS, and DR12 and supernovae light curve data into analysis. Since new DESI BAO data indicate a slightly longer sound horizon $r_dh$ than the other BAO observations, for the varying electron mass model, the larger $H_0 =69.44\pm 0.84 $ km$/$s$/$Mpc is indicated.