Title: Decoding Dark Matter through Dileptons at DUNE.

Abstract: In this talk, I will introduce a novel mechanism for detecting dark matter, known as Dark Matter Internal Pair Production (DIPP). I will demonstrate how DIPP can be used to probe a variety of dark matter models at the DUNE Near Detector, including dark photon-mediated dark matter. I will then explore its potential to probe models with couplings to second- and third-generation leptons. In particular, I will focus on dark matter searches through di-tau final states at DUNE ND, demonstrating that the resulting dark matter signals can exhibit distinctive kinematic features compared with backgrounds, particularly in the missing transverse momentum of the final state. I will conclude by presenting the sensitivity of DUNE ND to a few relatively unexplored models, including the $B-3L_\tau$ gauge model.