Matter parity as the origin of scalar Dark Matter

TL;DR

This paper proposes that matter parity explains the existence of scalar dark matter in non-supersymmetric theories, predicting specific scalar candidates and potential collider signatures, with implications for cosmic ray anomalies.

Contribution

It extends matter parity to non-supersymmetric models, identifying scalar 16 representations of SO(10) as dark matter candidates and analyzing their relic abundance and experimental signatures.

Findings

Scalar singlet and inert doublet are viable dark matter candidates.

Model predicts Higgs decay signatures at LHC.

Explains PAMELA cosmic ray anomaly via dark matter decays.

Abstract

We extend the concept of matter parity $P_M=(-1)^{3(B-L)}$ to non-supersymmetric theories and argue that $P_M$ is the natural explanation to the existence of Dark Matter of the Universe. We show that the non-supersymmetric Dark Matter must be contained in scalar 16 representation(s) of $SO(10),$ thus the unique low energy Dark Matter candidates are $P_M$-odd complex scalar singlet(s) $S$ and inert scalar doublet(s) $H_2.$ We have calculated the thermal relic Dark Matter abundance of the model and shown that its minimal form may be testable at LHC via the SM Higgs boson decays $H_1\to DM DM.$ The PAMELA anomaly can be explained with the decays $DM\to \nu l W$ induced via seesaw-like operator which is additionally suppressed by Planck scale. Because the SM fermions are odd under matter parity too, the DM sector is just our scalar relative.