Heavy neutral lepton at same-sign muon collider

Author(s): Ryuichiro Kitano, Ian Low, Ryutaro Matsudo, Shohei Okawa, and Subhojit RoyWe explore the discovery potential of heavy neutral leptons (HNLs), motivated by models addressing the origin of neutrino masses, at the proposed high-energy same-sign muon collider known as μTRISTAN. The study focuses on two complementary HNL-mediated signatures: (i) the lepton-flavor-violating (LF…[Phys. Rev. D 114, 055006] Published Wed Sep 09, 2026