Dileptonic Scalar Dark Matter and Exotic Leptons

Abstract

A simple scenario of long-lived dark matter is presented. Assuming lepton number $(L)$ conservation with Dirac neutrinos, the neutral component of an $SU(2{)}_L$ scalar triplet with $L=2$ is a suitable candidate, which decays to two neutrinos. Exotic leptons with $L=-1$ may also play a role, and act as anchors for small seesaw Dirac neutrino masses.

Comments: 9 pages, 4 figures, text revised, Eq.(9) corrected