Collider Signatures of Sneutrino Cold Dark Matter

TL;DR

This paper explores collider signatures of tau-sneutrino as a cold dark matter candidate in supersymmetry, highlighting distinctive decay signals that could be observed at future colliders.

Contribution

It introduces a scenario where the tau-sneutrino is the LSP and dark matter, analyzing its unique collider signatures compared to the neutralino LSP case.

Findings

Distinctive decay signatures for tau-sneutrino LSP identified

Parameter ranges compatible with sneutrino dark matter analyzed

Signals are observable at future colliders like a Next Linear Collider

Abstract

Decays of sneutrinos are considered in the case that in the presence of lepton-number violation in the sneutrino sector the lighter tau-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.