Implications of the CDMS result on Dark Matter and LHC physics

Abstract

The requirements of electroweak symmetry breaking (EWSB) and correct thermal relic density of Dark Matter (DM) predict large spin-independent direct detection cross section in scalar DM models based on underlying SO(10) non-supersymmetric GUT. Interpreting the CDMS signal events as DM recoil on nuclei, we study implications of this assumption on EWSB, Higgs boson mass and direct production of scalar DM at LHC experiments. We show that this interpretation indicates relatively light DM, M_DM ~ O(100) GeV, with large pair production cross section at LHC in correlation with the spin-independent direct DM detection cross section. The next-to-lightest dark scalar S_NL is predicted to be long-lived, providing distinctive experimental signatures of displaced vertex of two leptons or jets plus missing transverse energy.

Figures (3)

• Figure 1: DM direct detection cross-section/nucl. vs. $M_{\mathrm{DM}}$. Color shows SM Higgs boson masses from 130 GeV (yellow) to 180 GeV (violet). Solid lines represent current bounds, dashed lines are expected future sensitivities.
• Figure 2: Distance of DM displaced vertex from the interaction region at LHC experiments as a function of $\Delta M_{\text{DM}}.$ Examples for three data points with different values of DM mass $M_{\text{DM}}$ and sine of the mixing angle $s$ are show. The dashed line is the CMS tracker radius :2008zzk.
• Figure 3: Direct production cross-section of $pp \to H^{+} H^{-}$ (red), $pp \to S_{\text{DM},\text{NL}} S_{\text{DM},\text{NL}}$ (blue), $pp \to S_{\text{DM},\text{NL}} H^{\pm}$ (green) and $pp \to S_{\text{NL}} S_{\text{DM}}$ (black) at the LHC for $\sqrt{s} = 14~\text{TeV}$.