Preprint Suggests Isotropic Deceleration and Near-Zero Baseline Acceleration in Supernovae, Challenging Standard Dark Energy Model

A new preprint on arXiv presents an analysis of Pantheon+ supernovae data, suggesting isotropic deceleration and near-zero baseline acceleration. This finding, if confirmed, challenges the standard cosmological model's expectation for the deceleration parameter and could open new arguments in the dark energy debate. This work is preliminary and has not yet been peer-reviewed.