Search for dark matter in association with a hardronic top quark and a bottom quark

A search for dark matter using events containing a hadronically decaying top quark, one b jet arising from initial-state gluon-splitting, no leptons, and a large imbalance in transverse momentum is presented. The data being used were collected from proton-proton collisions at $\sqrt{s}$ = 13 TeV with CMS detector at the LHC and corresponding to an integrated luminosity of 137 $fb^{-1}$. The results are interpreted based on a simplified dark matter model that provides explanation for observed proximity of the dark matter and baryon abundances.