Signature of sub GeV dark matter particles at the LHC and the Tevatron

In this letter, we investigate the production of light dark matter particles at LHC in a N=2 SUSY inspired model and demonstrate that particles will be copiously produced if the colored messengers F_q are lighter than 1 TeV. We expect up to 10⁶ events if m_Fq≃500GeV, assuming a ∼1fb^-1 luminosity. In addition, we show that, even if m_Fq>O(1)TeV, searches for F_q production at LHC are promising because a kinematical signature can be used to separate the signal from background. This signature is similar to that expected in supersymmetric scenarios. Hence, our study shows that most of the m_Fq range could be constrained using LHC data. This should encourage further studies since they could infirm/confirm the MeV DM scenario.