Dark Matter abundance via thermal decays and leptoquark mediators
  We explore a new mechanism for reproducing the Dark Matter (DM) abundance:
scatterings of one DM particle on light Standard Model particles. Strong bounds
on its decays can be satisfied if DM undergoes freeze-in and has a mass around
or below the pion mass. This happens, for example, in theories with a
right-handed neutrino interacting with charged fermions through a leptoquark
exchange. These leptoquarks can be linked to the ones motivated by the
B-physics anomalies if assumptions about the flavour structure are made. DM
signals are unusual, with interesting possibilities for direct and indirect
detection. Achieving thermal freeze-out instead requires models with more than
one DM flavour, and couplings parametrically smaller than what needed by the
usual pair annihilations.
