Matter parity as the origin of scalar Dark Matter

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We extend the concept of matter parity Pₘ=(-1)³⁽ᵇ⁻ˡ⁾ to non-supersymmetric theories and argue that Pₘ 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 Pₘ-odd complex scalar singlet(s) S and inert scalar doublet(s) H₂. 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 H₁→ DM DM. The PAMELA anomaly can be explained with the decays DM→ νl 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.