Displaced Vertex and Disappearing Track Signatures in type-III Seesaw
Sudip Jana, Nobuchika Okada, Digesh Raut
We investigate the prospect of probing the type III seesaw neutrino mass generation mechanism at various collider experiments by searching for a disappearing track signature as well as a displaced vertex originating from the decay of SU(2)L triplet fermion (Σ). Because the triplet fermion is primarily produced at colliders through the electroweak gauge interactions, its production rate is uniquely determined by its mass. Using the type III seesaw formula, we find that a Σ particle with mass of a few hundred GeV, once produced, leads to a disappearing track signature which can be probed at the LHC and high luminosity LHC while the displaced vertex signature can be probed by various proposed experiments such as MATHUSLA, LHeC, and FCC-he.