Why all these prejudices against a constant?

TL;DR

This paper defends the cosmological constant as a simple explanation for the universe's accelerating expansion, challenging common objections and dismissing the need for more complex dark energy models.

Contribution

It argues that the prevailing objections to the cosmological constant are unconvincing, reaffirming its viability as the explanation for cosmic acceleration.

Findings

The cosmological constant remains a plausible explanation for universe acceleration.

Common arguments against the cosmological constant are found to be unconvincing.

The paper dismisses the necessity of alternative dark energy explanations.

Abstract

The expansion of the observed universe appears to be accelerating. A simple explanation of this phenomenon is provided by the non-vanishing of the cosmological constant in the Einstein equations. Arguments are commonly presented to the effect that this simple explanation is not viable or not sufficient, and therefore we are facing the "great mystery" of the "nature of a dark energy". We argue that these arguments are unconvincing, or ill-founded.