Speaker
Description
Accelerator neutrino experiments provide profound opportunities for Beyond the Standard Model physics searches. Among them, the near detector of DUNE experiment and its off-axis displacement, DUNE-PRISM, are widely studied utilizing energy and angular spectrum difference between SM and BSM interactions. There are other types of searches that utilize additional BSM neutrino flux, and tau neutrino appearance at DUNE near detector should be one of the stringent smoke-gun of BSM physics. In this work, we studied what we can learn at DUNE-PRISM, focusing on hard and wide neutrino spectrum from heavy BSM mediators, with demonstrative anomaly-free $B-3L_\tau$ models. We found that hard BSM $\nu_\tau$ spectrum allow us choose loose background selection keeping many signals to increase sensitivities, while wide spectrum give slight advantage of off-axis detector over on-axis at heavier $Z'$ mass region.