Comments on "Unified neutrino mixing and approximate $\mu-\tau$ reflection symmetry" (Mod. Phys. Lett. A, 40 (2025) 26, 2550097 [arXiv:2502.18029 [hep-ph]])

TL;DR

This paper revisits a neutrino mixing model with $$ reflection symmetry, correcting previous errors, and finds that the model's predictions are compatible with the latest experimental data.

Contribution

It corrects earlier errors in the neutrino mass matrix equations and updates the analysis using current data to validate the model's predictions.

Findings

Corrected equations show the model is compatible with recent data.

Previous conclusions about exclusion are invalid with updated data.

The model remains viable for both normal and inverted mass orderings.

Abstract

Resolving mass ordering is an important issue in the neutrino physics. In Ref.\cite{yt} the authors investigate the phenomenology of a unified neutrino mixing framework and reveal that the predicted sum of neutrino masses derived from an approximate $\mu-\tau$ reflection symmetric flavor neutrino mass matrix based on the unified neutrino mixing with an inverted mass ordering, is excluded from DESI2024 and Supernova Ia luminosity distance data. We note that in Ref.\cite{yt} an error is present in Eq.(20), {\it i.e.}, the expression for $ M_{23}^{\mu-\tau} $, a similar error also appears in Eq.(26) for $M_{13}^{\mu-\tau}$. That is, the condition that $M_{ee}$ and $M_{\mu\tau}$ are real is omitted. We impose this condition and analyze its consequences. Using the newest data\cite{azz}, it is obtained that the predicted sm derived from the approximate $\mu-\tau$ reflection symmetric neutrino mass matrices $M_{23}$ for both NO and IO are allowed. We note also that their conclusion is invalid, as it is based on outdated data.