Response to the ${}_{\Lambda }^7$He interpretation of MAMI's recent determination of $B_{\Lambda }{(}_{\Lambda }^3$H)

Abstract

We respond to the recent suggestion by A. Gal [arXiv:2604.18259] that the sharp pion-momentum peak at $p_{{\pi }^{-}}\approx 113.8$~MeV/$c$ observed in our ${}^7\mathrm{Li}(e,e^{\prime }{K}^{+})$ electroproduction experiment at MAMI [Phys. Rev. Lett. 136, 152301 (2026)] originates from ${}_{\Lambda }^7\mathrm{He}$ weak decay rather than from ${}_{\Lambda }^3\mathrm{H}\to {\pi }^{-}+{}^3\mathrm{He}$ as we reported. We present quantitative arguments against this interpretation and conclude that the ${}_{\Lambda }^3\mathrm{H}$ assignment remains the most well-supported interpretation of the data.