Constraining the transitional magnetic dipole moment interaction between active and heavy neutrinos with the Z' at FASERnu

Abstract

We investigate the effects of the transitional magnetic dipole type interactions of the active-to-heavy-neutrino associated with a new neutral gauge boson Z' on neutrino-nucleon scattering at the ForwArd Search ExpeRiment-nu (FASERnu ). We consider the neutral-current neutrino-nucleon scattering (nu Arightarrow N A', where A' denotes the disintegrated nuclei) as the production mechanism of the heavy neutrino N at FASERnu and estimate the sensitivity reach on the magnetic-type dipole coupling omega _{nu _alpha } for a range of heavy neutrino mass (1,textrm{GeV}< textrm{M}_{textrm{N}} < 70 mathrm{~GeV}). In this study, we consider three benchmark models, in which the heavy neutrino is coupled to L_e, L_mu or L_tau doublet, respectively.