Collider signatures of sneutrino cold dark matter

Abstract

Decays of sneutrinos are considered in the case that in the presence of lepton-number violation in the sneutrino sector the lighter τ-sneutrino is the Lightest Supersymmetric Particle and the Cold Dark Matter in the Universe. In such circumstances the signals from sparticle decays differ considerably from the “standard” case where the lightest neutralino is the Lightest Supersymmetric Particle and it is found that in a wide range of parameters compatible with the sneutrino Cold Dark Matter hypothesis signatures characteristic for such a scenario should be easily observable at for example a Next Linear Collider.