Neutrino-Assisted Early Dark Energy is a Natural Resolution of the Hubble Tension

TL;DR

This paper defends neutrino-assisted early dark energy as a natural and promising solution to the Hubble tension, correcting previous misconceptions and emphasizing the need for comprehensive parameter space exploration.

Contribution

It refutes prior claims against the model by identifying calculation errors, redefining naturalness, and exploring the full parameter space.

Findings

The model remains a viable resolution of the Hubble tension.

Previous criticisms were based on incomplete analyses.

The model addresses fine-tuning and coincidence problems.

Abstract

It has very recently been claimed that the neutrino-assisted early dark energy model -- a promising resolution of the Hubble tension that can ameliorate the theoretical fine-tuning and coincidence problems that plague other theories -- does not provide natural or cosmologically interesting results. In this short paper, we show that these conclusions are incorrect for three reasons. First, we identify errors in the calculations. Second, we dispute the definition in of what constitutes an 'interesting' and 'natural' model. Finally, we demonstrate that the conclusions of were arrived at without fully exploring the full parameter space of the model. Neutrino-assisted early dark energy remains a natural and interesting potential resolution of the Hubble tension that merits further study.