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In arXiv:2305.14140 [hep-ph] the authors analyze the radiative leptonic decay$\ell^- \to \nu_\ell \, \overline{\nu}_{\ell'} \, \ell^{\prime -} \, \gamma$ todistinguish between Dirac and Majorana nature of neutrinos. They utilize theback-to-back kinematics for this purpose, a special kinematic configurationwhich we first proposed in our paper arXiv:2106.11785 [hep-ph]. However, theiranalysis suffers from two fundamental issues: (1) anti-symmetrization of theiramplitude and (2) their study of the special back-to-back configuration. Thismakes their conclusion and comments invalid and untenable.

Comments on "On the Dirac-Majorana neutrinos distinction in four-body decays" (arXiv:2305.14140 [hep-ph])