Probing bottom-associated production of a TeV scale scalar decaying to a top quark and dark matter at the LHC

A bstract A minimal non-thermal dark matter model that can explain both the existence of dark matter and the baryon asymmetry in the universe is studied. It requires two color-triplet, iso-singlet scalars with $$ \mathcal{O}\left(\textrm{TeV}\right) $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi> <mml:mfenced> <mml:mi>TeV</mml:mi> </mml:mfenced> </mml:math> masses and a singlet Majorana fermion with a mass of $$ \mathcal{O}\left(\textrm{GeV}\right) $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi> <mml:mfenced> <mml:mi>GeV</mml:mi> </mml:mfenced> </mml:math> . The fermion becomes stable and can play the role of the dark matter candidate. We consider the fermion to interact with a top quark via the exchange of QCD-charged scalar fields coupled dominantly to third generation fermions. The signature of a single top quark production associated with a bottom quark and large missing transverse momentum opens up the possibility to search for this type of model at the LHC in a way complementary to existing monotop searches.