Magneto-$\hat{I}½$: Heavy neutral lepton search using ${}^{241}$Pu $β^-$ decays

C. Lee, X. Zhang, A. Kavner +12

The MAGNETO-$\hat{I}½$ experiment searches for keV-scale heavy neutral leptons (HNLs) through precise measurements of the $β^-$-decay spectrum of ${}^{241}$Pu. We present spectra comprisi…